Welcome to DXM's Starship Size Comparison Charts!

    Any devoted SF fan is probably used to geeking out on their favorite franchises.  And one such geeky pursuit is the starship size comparison chart.  Over the years, more of these fan-made images have appeared online than can easily be counted.  Most are merely one-off projects that are never repeated.  Some are extensive, but stick with only one franchise.  But, a few have been rather expansive and their authors have added to them until they have become something of a genre of geekery unto themselves.

Among the more famous are the following examples:

Jeff Russell's STARSHIP DIMENSIONS - updated for more than a decade with millions of visitors over that period, Starship Dimensions has been officially retired.  While still online & no doubt used as a go-to reference for many, there will be no future updates to this site.

Bernd Schneider's Ex Astris Scientia is a Star Trek fan site with immense amounts of data compiled on the Trek universe.  The Fleet Charts section contains scale comparison charts for most of the ships appearing in Star Trek.  Although extensive, these charts do not appear to be being updated, save for the addition of a JJverse chart or two.

Dan Carlson's Star Trek Minutiae also has a charts section.  Most of the Trek charts are very similar to those at Ex Astris Scientia, though there are some notable differences in the size figures for some ships & stations.  There are also comparison charts for general sci-fi ships & stations at 10ppm, 1mpp, 10mpp & 100mpp scales.  Dan Carlson continues to update these charts at irregular intervals.

Dirk Loechel has compiled a monstrous sized scale chart at DeviantArt.  It is a 10mpp scale and the full size JPG image is 4268x5690!  Jeff Russell's retired site directs visitors to this chart as an example of a chart that is still being updated, however Dirk Loechel's own description claims that he has added all he can and there will be no further major updates to his chart.

    In addition to simply being a total sci-fi geek, one of the things that motivated me to start playing around with making scale charts of my own a few years ago is the fact that there are several often repeated sizes for certain ships that just don't seem to fit with the available facts insofar as they can be determined.

    There are many sci-fi franchises that I've enjoyed over my lifetime.  But, there are seven major franchises that particularly interest me; Star Trek, Star Wars, Battlestar Galactica, Babylon 5, Stargate, Farscape & Gene Roddenberry's Andromeda.

    There are disagreements about the sizes of various ships from all of these franchises.  However, the two that seem to have the most egregious errors that are continually propagated are Stargate & Farscape.  I cannot guarantee that my figures are accurate, of course.  But I will try to explain my reasoning behind them.  As you might could tell, I intend to include the one thing that most other chart makers don't - commentary.

    In the future, I may add both smaller and larger charts.  But, for now, we will stick with these nine scales; 5ppm, 2ppm, 1mpp, 2mpp, 5mpp, 10mpp, 20mpp, 50mpp & 100mpp.  You'll notice that there is a lot of over-lap - many ships appear on multiple charts.  This is to make it easier to compare & and get a grip on the relative sizes of the ships.  Dirk Loechel did an excellent job of putting together a single, massive chart - but, there is so much diversity in sci-fi ship sizes that a single chart is fairly impractical.  Indeed, even Dan Carlson's Small, Medium, Large & Huge charts leave a lot out.  Jeff Russell had eight different scales.  I'm starting with nine, but like I said, there will likely be more at some point.

    The sources for the sizes I use come from various sites, including: Starship Dimensions, Ex Astris Scientia, Star Trek Minutiae, Memory Alpha, Wookieepedia, B5 Tech Manual & BSG Tech Manual.  There are times when I dispute the sizes for certain ships that are listed at these sources, in which case the figures I use are my own.  I do not use most of the figures listed at the Stargate wiki & neither should anyone else.  I'll explain that in detail below.

    One further note: some ships will be included or not at certain scales depending on the resolution of the source image(s) that I have for them.  Also, I will sometimes use a different image of the same ship for different scales, depending on which one seems to look better at that scale.

5 Pixels Per Meter

    The 5ppm chart features everything from the 3.5 meter Droid Starfighter to the 225 meter NX-class.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. The Borg Scout is a guess based on the apparent size of the wreckage where the Borg "Hugh" was discovered.

2. The remastered versions of the J-class transport & the SS Aurora are guesses based on the apparent size of the latter's viewports.

3. It has long been said to be wise not to start a discussion on a fan forum about the size of the Defiant, unless you want a fight on your hands...and yet, no chart makers show it at any other size than the one I used.

4. I have shown the Tholian ship at its supposedly official size.  However, I believe -logically, given its shape- that there is no way this ship could really be that small.  In future charts, I may include a revised size based on my own opinions.

5. The Species 8472 bioship has been suggested by some to be 50 meters long - likely comparing it on screen to Voyager.  Jeff Russell shows it to be 300 meters long - likely comparing it on screen to a Borg Cube.
    This demonstrates one of the issues with using special effects shots to determine scale.  SFX teams often play with the scaling in order to improve the over all look of the shot.  When small ships & large ships are in the same scene, they must either scale down the big ship or scale up the little ship - otherwise, either the big one wouldn't fit in the shot or the little one would be so small the audience couldn't see it.
    Considering the design of the ship and the fact that it has a fair amount of interior space, but is apparently crewed by a single pilot, I decided 100 meters looked about right.

Notes on Star Wars ship sizes:
1. The Millennium Falcon is sometimes listed as being only about 27 meters long, but a careful analysis shows that this would make the internal passageway too small for Han to stand up in, to say nothing of Chewie.  Here, I agree with Dan Carlson's 34.4 meter figure.

2. The official sizes listed for Jedi starfighters & Rebel snowspeeders appear too small to fit with the needed space for pilots &/or astromechs.  My figures of 7-8 meters & 7.5 meters respectively are best guesses at a reasonable size.

3. The official size for the A-wing is far too large, resulting in a cockpit nearly as big as that of the Millennium Falcon.  My figure of 7 meters seems to fit with the size of a human pilot.

4. The TIE Starfighter's official size makes its ball cockpit far too small - and another clue that the official sizes for TIEs don't make sense is that (using those sizes) the ball cockpits are of totally different sizes!  I chose 10 meters for the standard TIE, partly because all the supplemental materials used to use that size, but also because it appears to be fairly reasonable compared to the size of the pilot.  Most of the other TIE sizes were arrived at by matching the viewport sizes with that of the 10 meter TIE Starfighter.

Notes on Babylon 5 ship sizes:
1. The Shadow vessels in B5 often seemed to be different sizes from scene to scene.  Since they are organic in nature, it is possible to explain this by saying they were at different stages of growth...  Nevertheless, most people quote a size of around 15 meters for the Shadow fighter, though Dan Carlson lists it as "40 meters (average)."  There is one really close comparison possible - when a Narn fighter rams a Shadow fighter.  Based on this, I estimate its length at 51.5 meters.

Notes on Stargate ship sizes:
1. Most charts quote 14.2 meters for the F-302.  By comparing the 302 to both the Stargate itself & the inarguable size of a Boeing 747, I estimate the 302 to be around 12 meters long.  This includes the forward antenna.

2. My Wraith Dart estimate is significantly longer than the Puddle Jumper, because on at least two separate occasions Sheppard stated that he left a captured Dart on another planet because he did not believe it would fit in the Atlantis gate room.

3. Now we're getting to some of the ridiculous figures listed other places.  The Ori fighter is most often stated to be 20 meters long.  When you consider that at least 20-25% of the craft's length is taken up by the single-person cockpit, which has the pilot in a reclined but not fully stretched out position, it should be clear that 20 meters is far too large.  Some people have even shown top views in their charts which clearly show the pilot's seat - and then super impose a tiny human silhouette onto it, with limbs unnaturally long -which still can't reach the controls!
    I can only assume that this grossly inaccurate figure is based on a few SFX shots where these fighters do indeed seem very large compared to Death Gliders and Al'kesh.  But, such SFX scenes were clearly rushed and of lower quality.  Some have suggested that the scene of an Ori fighter dropping a ring platform proves that they are 20 meters long, give or take.  But, when you compare the actual size of a ring platform to a human, and then to the Ori fighter, it actually supports a smaller size.

4. Even more obviously wrong is the commonly stated size of the Tel'tak aka Goa'uld cargo ship.  Every chart I've seen shows it to be 15 meters long.  This is down right laughable, when you consider how much we know about the internal space of the Tel'tak.  The cockpit is a two-person, side-by-side job to start with.  Then there is a large area behind them which houses the escape pods.  Then, on the other side of the bulkhead, the cargo bay.  Then the engineering room behind that.
    I can't believe people can show a tiny 15 meter Tel'tak right beside a comparatively huge 302 & Glider and not see the blindingly obvious!  My rough estimate places the Tel'tak length at 25 meters.  Which makes its cockpit close to the size of the Millennium Falcon's, instead of smaller than a Death Glider's!

5. Perhaps more forgivable because of less screen time -but nevertheless an even larger error- is the repeatedly listed size of 35 meters for the Al'kesh.  How anyone ever arrived at such a figure I have no idea.  The same set pieces were used for the Al'kesh cockpit & the Tel'tak cockpit, meaning the viewports are the same size.  However, the Al'kesh cockpit is much smaller relative to the craft's overall size.
    At the scale most people quote, the Tel'tak cockpit is too small for even one pilot - but the size they use for the Al'kesh is even more comically small!  There'd barely be room for the pilot's head in there!  A simple comparison of the cockpit results in an estimate of about 75 meters for the length of the Al'kesh.

Notes on Farscape ship sizes:
1. At the sizes often quoted by others for the IASA module, the Peacekeeper Prowler and the Scarran Predator, it is doubtful that there would even be room for a single pilot to fit inside them.  The figures I use are my own best guesses at reasonable sizes.

2. The Marauder type A is listed by Dan Carlson as 14 meters.  This seemed a bit too small to me, but might be within the bounds of reason.  I list it as 20 meters.  (Though, on a closer inspection of its first appearance, the apparent size of what looks like a cockpit viewport would seem to suggest an even larger size.)

3. The Marauder type B, however, is listed as 12 meters by Jeff Russell & 16.4 meters by Dan Carlson.  These figures are far too small to be possible.  It is supposed to carry 30 troops.  Also, in The Peacekeeper Wars, Scorpius & Sikozu exit a type B Marauder via an elevator in one of the engine? pylons.  Given this, my figure of 35 meters is the absolute minimum possible length of the type B.  It may well be larger.

4. The Transport Pod is generally listed as about 18 meters long.  On the one hand, this could be fairly accurate.  But, then again, many shots of the craft make it look much larger.  For now, my estimate is 32 meters.

5. The size of the Nebari Pod is best estimated by comparing Durka to the viewport and then comparing the viewport to the overall craft.  At first I estimated 37 meters, barely larger than Jeff Russell's 30 meters.  But then I learned that what I thought was the front of the ship was actually the back!  This resulted in a re-evaluation, and an estimate of 50 meters total length.

2 Pixels Per Meter

    The 2ppm chart features everything from the 24 meter Romulan shuttle to the 376 meter HMS Camden Lock from Hyperdrive.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. The 65 meter figure for the original version of the SS Aurora comes from another chart on DeviantArt.  It's interesting to note, however, that the model was a re-use of the Tholian ship.  Furthermore, 65 meters is probably as small as it could reasonably be -considering its design- and still have adequate room for the crew.  Contrast this with the absurdly tiny 15 meter Tholian ship.

Notes on Star Wars ship sizes:
1. The Imperial Customs Frigate was designed by West End Games for their Star Wars Role Playing Game.  As it was their design, it's hard to argue with the stated size of 35 meters.  Nevertheless, given the shape of the vessel and the relative size of what appears to be the bridge/cockpit, 35 meters is ridiculously tiny.  My best guess is that it could not realistically be any smaller than 120 meters long.  And possibly longer.

Notes on Battlestar Galactica ship sizes:
1. The size of the Eastern Alliance Destroyer can be estimated fairly easily by the fact that the very small cockpit section and its connecting pylon must be large enough for humans to walk through.

Notes on Babylon 5 ship sizes:
1. Both the Drakh & Thirdspace fighters are sometimes listed by others as smaller than what I have here.  It is possible that this is at least sometimes due to some people insisting that the Whitestars are much smaller than they really are.

Notes on Stargate ship sizes:
1. The Replicator 'spider' that landed on Dakara appeared to be no more than 25 meters long, while the ones engaging the Jaffa Rebels & Ba'al in orbit appeared to be at least a few hundred meters long.  Again, this is an issue with SFX shots.
    The first time we saw such a ship, Fifth was holding Carter prisoner aboard it.  Logically, given the shape of the craft, there would not have been enough space for the room she was held in if it were 25 meters long.  Since they were made out of Replicator blocks, there could easily be many different sizes of them, of course.  But, for simplicity's sake, I've shown it as 50 meters long, enough room for an interior prison cell.

Notes on Farscape ship sizes:
1. The official charts(which only show relative sizes, with no scale listed) that came with the Peacekeeper Wars DVD show the Scarran Striker to be barely larger than a Transport Pod.  However, the Farscape season 4 finale showed a Transport Pod exploiting wormhole physics to actually fly through a Striker.
    As the crews were seen passing through each other and were of correct relative size, this means the Striker is clearly significantly larger.  Based on my 32 meter Pod, I estimate the Striker to be about 100 meters long.

2. Talyn, as a bio-mechanoid, grew progressively larger as time went on.  Although Moya was mature, it is possible she was growing as well.  We certainly saw a larger Leviathan at one point, but there is no reason to assume that Leviathans all grow to the same size.  For the sake of argument, we will assume that Moya's size is more or less a constant.  Based on Moya's size, I estimate that Talyn was already upwards of 200 meters long shortly after his birth.

1 Meter Per Pixel

    The 1mpp chart features everything from the 50 meter Lady Luck to the 685 meter Sovereign-class Enterprise E.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. The Ferengi D'Kora-class Marauder is listed by Ex Astris Scientia and most others as 366 meters long.  I don't know where this figure originated, but it does not fit with the apparent size of the D'Kora when compared on screen to the Galaxy-class Enterprise D.
    Memory Beta lists an absurdly large size for the Marauder.  The figure of 487 meters which I use here came from an illustration on DeviantArt.  I have no idea where the artist got it, but it appears to fit quite well with the Marauder's appearance in TNG.

Notes on Star Wars ship sizes:
1. Not a scale note, per se, but all supplementary sources have for decades said that the Nebulon-B frigate can hold two squadrons of fighters.  In Star Wars, a squadron is 12 fighters.  Given the ship's skeletal design, there is absolutely no way you could fit 24 fighters in it.  You couldn't even find enough external area to attach them to!

Notes on Babylon 5 ship sizes:
1. The figure of 475.6 meters for the Whitestar is fairly well accepted, however, a minority of B5 fans insist that it is much smaller.  This is due to a rather poorly executed SFX shot at the end of B5's final season - when Sheridan stands at the Whitestar's viewport and salutes the command crew of B5.  This shot makes the bridge of the Whitestar appear to be much smaller than it could logically be.
    I've seen at least one attempt by a fan to demonstrate that the smaller Whitestar still has room for the bridge set by illustrating this with a wire frame 3D model.  And, at a brief glance, it seems accurate enough.  Until you realize two things; the artist made no allowance for pipes, conduits or structural supports - the only way the bridge set fits on the smaller Whitestar is if there is nothing but a thin wall composing the part of the ship that isn't crew space...  And, this smaller scale would also make the pylon connecting the bridge to the rest of the ship so small that it could only be used by the crew like one of those covered slides at a playground!

Notes on Stargate ship sizes:
1. The four-sided Goa'uld pyramid ship, which some fans have taken to calling a Cheops class, has only been seen twice.  Once in the original movie and once in the SG-1 series.  The craft is larger than the great pyramids at Giza.  It's also worth noting that the great pyramids were slightly larger in ancient times.  Based on a comparison with the great pyramids, I estimate the Cheops at 300 meters wide.  Though, it could be as small as 250 meters.

2. And now, another dreadful inaccuracy to clear up.  The X-303, Prometheus, is forever listed on other charts as being 195 meters long.  This size would be far too small to hold an entire flight group of F-302s.  If one accepts the inaccurate 15 meter Tel'tak & 35 meter Al'kesh, then a 195 meter Prometheus looks about right.
    But, when you use the more realistic 25 meter & 75 meter sizes, suddenly the lunacy of such a small Prometheus becomes apparent.  My own estimate places the length of the X-303 at 398 meters long.  This size not only fits with the realistic sizes of the Tel'tak & Al'kesh, but also fits with the Asgard O'Neill & with Anubis' Flagship.

3. And now the other Tau'ri ship - the BC-304 or Daedalus class.  The size quoted by other charts for this ship is 225 meters.  This is perhaps the most obviously wrong Stargate ship size of all and for a very simple reason.
    We've seen plenty of shots of F-302s launching from BC-304s.  We've seen them launch two 302s side by side from a single bay.  We know each bay can hold at least 6 or 8 F-302s.  At 225 meters long, a BC-304's fighter bays are too small to hold more than about 3 or 4 fighters...and barely large enough to launch a single 302.  And that's with 12 meter 302s.  If you use the 14.2 meter figure, the 225 meter 304 could only hold 2 fighters per bay - and only if stored sideways, and thus unable to be launched!
    My best estimate of the BC-304's length is 586 meters, including the forward antenna.
    A side note: the Stargate Wiki's only source for sizes lists the Odyssey as shorter than the Daedalus - and gives a distorted looking illustration to show this.  As these ships are exactly the same design and appear no different from one another on the show, it should be obvious that the Stargate Wiki's source cannot be trusted.

Notes on Farscape ship sizes:
1. Talyn was considerably larger by the time he was around one year old.  My very rough guess, for now, is 500 meters.  But eventually I will try to review Talyn's size more carefully.

2 Meters Per Pixel

    The 2mpp chart features everything from the 89 meter Romulan scout to the 1,187 meter Recusant-class Destroyer.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. Some people refuse to accept that the Klingons have more than one class of "Bird of Prey."  Even for those who don't argue against the larger K'Vort class BoP, they often don't include it on their charts.
    In "Yesterday's Enterprise," the K'Vort appears to be approximately the same size as the Enterprise D's saucer section.  My estimate placed it at 321 meters, but I chose to accept Dan Carlson's only slightly larger 327 meter figure.  (It should also be noted that in the show, the K'Vort is invariably shown with its wings in a raised position.  Indeed, it seems likely that the wings are fixed and cannot be moved.)

Notes on Stargate ship sizes:
1. Dan Carlson lists the Traveler Corvette at 200 meters.  If this is based on comparison to the inaccurate 225 meter Daedalus, then it sort of makes sense.  Comparing it to the more reasonable 586 meter Daedalus, I estimate 350 meters for the Traveler ship.

2. Comparing the Vanir ship to the Traveler ship, my best estimate is 400 meters.  Of course, considering that the Vanir ship is seen mere meters from the Traveler ship and is clearly somewhat longer than the Traveler vessel...it's unclear how Dan Carlson came up with 200 meters for the Traveler ship & 40?! meters for the Vanir.

3. Comparing the Seedship with Destiny, and assuming 1,000 meters for the Destiny, the Seedship appears to be 450 meters.  Most fans seem to agree on a 1 kilometer Destiny, but recently I've run across suggestions of it being shorter.  SGU had far too little external reference points to be very sure.

4. The Asuran Corvette is rarely included on scale charts, but one of the few I've seen claimed 400 meters.  My estimate is around 600 meters.  The only real point of comparison is its first appearance in close proximity to the Apollo.  Of course, since other chart makers invariably list the BC-304 as 225 meters, this could go part of the way towards explaining their 400 meter figure for the Asuran ship.

5. The Cyborg ship from "The Daedalus Variations" has little screen time and it's very difficult to be sure of its size.  My best guess for now is 750 meters.

6. Most people seem intent on using either 700 meters or 680 meters for the size of the Ha'tak.  There are two reasons why this just doesn't work.  There are really only two primary ways of determining the size of the Ha'tak.  The best and only direct-method is measuring the Pel'tak viewport - which is only ever seen up close in the finale of SG-1 season 1 & premiere of SG-1 season 2.  Using this method, we do indeed get a figure of about 700 meters.  So, why isn't this right?  Well, it is.  Sort of.
    There are two very distinct CGI models used for Goa'uld motherships.  The first version is smaller and is the only one we've seen the viewport on.  The later, larger model doesn't even seem to have a viewport. (On the exterior shots of the CGI model, that is.)  Now, most people just wave their hands and say they are the same ship.  But, I, like some others, prefer to see these as two separate ships - an old version and a new version.
    So, without a viewport, how do we estimate the size of the second Ha'tak?  The second, more difficult method is comparing the Ha'tak to other ships.  This method can also conceivably lead to a figure of around 700 meters - if you entertain incorrect assumptions about the other ships.  If you use the more accurate estimates of the other ships, however, then you get something around 1 kilometer.  Here, I agree with Jeff Russell - his site has little in the way of Stargate ships, but he does show the 'new' Ha'tak at 1,000 meters.

Notes on Farscape ship sizes:
1. Talyn was of considerable size by the time of his death.  Until I do a more detailed review, my current best guess is 750 meters.

Notes on Other ship sizes:
1. The Rodger Young from Starship Troopers is listed as 550 meters by Jeff Russell and others.  While it is certainly possible that this figure is correct, it seemed too small to me.  At some later date, I will try to do a detailed analysis, but for now my rough guess is 1 kilometer.
    Update: Upon closer inspection, I believe that the 550 meter figure listed by others is in deed accurate.  Eventually, the chart will be updated to reflect this.  But, I'm really bad at getting around to such things!

5 Meters Per Pixel

    The 5mpp chart features everything from the 356 meter Shadow scout to Anubis' 5,800 meter Flagship.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. The 1,353 meter figure I use for the Romulan Warbird is fairly well accepted among fans.  However, it is worth noting that many chart makers list it at different sizes - ranging from just over a kilometer to Dan Carlson's 1,341 meter figure.  It should also be noted that some shots in TNG seem to show the Warbird as twice as long as the Enterprise D, while others seem to show it as the same length as the Galaxy-class.

2. 1,500 meters is the generally accepted size of the Jem'hadar Battleship.  However, in the final confrontation with the Dominion over Cardassia Prime, a ship of exactly the same design is seen which appears to be approximately 4,500 meters -when compared to the Jem'hadar Battlecruiser that passes directly over it.  Some fans accept this over sized ship as the SFX mistake it probably is, while others consider it to be a separate ship class.

Notes on Star Wars ship sizes:
1. The Imperial-class Star Destroyer has been accepted to be 1,600 meters long for decades.  But, in recent years, some fans have chosen to show it as 1,606 meters.  While it may be an interesting mathematical exercise to do a more precise conversion to meters from the designed mile-long figure, it is also a needless complication.  I, for one, chose not to indulge in such an exercise.  (I also refuse to call it by the fan-imposed name "Imperator")

2. For decades, the Mon Calamari MC80 Star Cruiser was said to be 1,200 meters long.  The truth, of course, is that each MC80 is unique and likely all have slightly different sizes.  However, most SFX shots in Return of the Jedi appear to show them as much closer in length to the ISD than the 1,200 meter figure.  The figure of 1,500 meters seems much better as an 'average' length.

3. Some charts show Home One as more or less the same size as the MC80.  However, the screen time of Home One in RotJ is greater and much more detailed.  Many fans now agree on the 3,810 meter figure I use here.  (While I disagree with Curtis Saxton on other matters, I agree with his estimates on the Calamari ships.)

Notes on Battlestar Galactica ship sizes:
1. The size of the original 1978 Galactica is another figure that is disputed.  Though, as you'll see, there's no genuinely good reason for such a dispute.  First, let's start with Jeff Russell - he shows the Galactica as 610 meters long.  This is absurdly small.  Jeff Russell claims this is the craft's 'official' length, though I don't know where his 'official' source comes from.  He does link to a page which has an in depth analysis of the many SFX shots in the 1978 series to try to determine the 'true' length of the Galactica.
    Once again, we see fans abandoning reason for the madness of trying to find a SFX shot they can actually measure...and, inevitably, ignoring any SFX shots that don't support their conclusion.  This page does start out by saying that the original purpose of the analysis was to prove the 6,080 foot figure...but it ultimately concludes that the Galactica is 1,265 meters long.  Everyone except Jeff Russell now uses the 1,265 meter figure.
    The actual 'truth' is that the 6,080 foot figure is correct.  And here's why...
    First let me cover the more subjective reason of military practicality...  No one disputes the 1,768 meter size for the Cylon Basestar.  In the 1978 Battlestar Galactica's final episode, the Galactica takes on and defeats a lone Basestar.  The Colonials clearly had near parity with the Cylons in most tech areas in the original series.  The Galactica was not considered a match for a Basestar.  It was close, but the Basestar was still larger and had more fire power.  At 610 meters, the Galactica would have been like a tenth the size of the double-saucer shaped Basestar!  And even at 1,265 meters, the Galactica would have been only one fourth or fifth the size.  6,080 feet is roughly 1,853 meters, which is the size I use here.  At this scale, the Galactica is roughly half the size of the Basestar, a much closer match.
    Now for a different kind of on screen evidence...  Sometimes, what we see inside the ship is as important as what we see outside the ship.  The Eastern Alliance Destroyer is approximately 125 meters long.  We know from the show that this vessel was docked aboard the Galactica.  This means that the Galactica's flight pod hanger opening must be large enough for the Destroyer to enter.  Some people would be inclined to reverse the reasoning and say the Destroyer must be much smaller.  But, due to its design, there is a serious limit to how much you could shrink the Destroyer and still have its cockpit/bridge be big enough to have people in it.  Neither the 610 meter nor 1,265 meter Galactica would have large enough hangers to allow the landing of the Destroyer.  Only the 1,853 meter size fits.
    And finally, two more reasons why the 6,080 foot scale is the correct one...  Glen A. Larson, creator of Battlestar Galactica, stated that the ship was this length.  Also, John Dykstra, who designed the model, specifically designed it to be one nautical mile(6,080 feet) long.  So, both the creator of the series & the creator of the ship agree on the 6,080 foot length!
    To me, this is the most absolutely conclusive proof of the commonly listed size(1,265 meters) being flat wrong.

Notes on Babylon 5 ship sizes:
1. Like most Shadow vessels, the Shadow Battle-crab appears to be shown at different sizes in different scenes.  However, as an 'average' size which fits with most shots of it in close proximity to other ships, I believe 1,250 meters works fairly well.

2. The Minbari Sharlin class War Cruiser is generally agreed by fans to be 1,600 meters long.  A few charts, though, sometimes show it at various smaller sizes - often pointing to display screens on B5 itself quoting much smaller sizes.  However, the 1,600 meter size fits best with the apparent size of the Sharlin when compared to Babylon 5 itself or other big ships.  Keep in mind that display screens on the show are just another form of SFX, and are often every bit as unreliable or even worse than the space battle SFX.

3. The Centauri Primus class Battlecruiser is occasionally listed at various smaller sizes, but I believe that 1,800 meters -quoted by both Jeff Russell & the B5 tech manual site- fits best with what is seen on the show.

4. The Excalibur is a big ship, no doubt about that.  But most fans seem to want it to be even bigger than it is.  Most charts quote the same 2,990 meter size as the B5 tech manual.  Jeff Russell is one of the few to use the correct 2,000 meter length.  Where the larger figure comes from, I do not know.  However, the ship was clearly stated by characters on screen to be a mile and a quarter long.  Once in "A Call to Arms" and once on Crusade.  And while dialogue is not conclusive, Crusade also shows the Excalibur parked right alongside Babylon 5 - where it is clearly two kilometers long, not three.

5. The Vorlon Star Dreadnaught is generally accepted to be 1,330 meters long.  However, some fans -myself included- have noticed that this scale makes the Dreadnaught appear too small compared to the other big ships of B5.  In particular, a 1,330 meter Star Dreadnaught looks tiny compared to a Shadow Battle-crab and Minbari Sharlin.  If scaled to 2,000 meters long, however, the Vorlon ship looks much more true to the show when compared to the other ships.

Notes on Stargate ship sizes:
1. As previously mentioned, the old Ha'tak is around 700 meters wide.  While the 'new' Ha'tak is around 1,000 meters.

2. Certain SFX shots make the Wraith cruiser appear nearly the same size as the Daedalus, while others make it look closer to twice that size.  Comparing the cruiser to the Hive ship would seem to indicate the larger size is more likely.  Thus, I show the Wraith cruiser as 1,200 meters long.

3. The only 'official' source the Stargate wiki has for ship sizes is something called Stargate DVD Collection, but I'm not entirely sure what this is.  I have, however, looked at the scanned images of this magazine-like thing - and I can assure you that almost all the sizes it states are wrong.  Most of them are so far from reality that it amazes me that anyone would take anything it had to say seriously!
    That being said, the one thing I do agree with it on is the size of the Asgard ships - 1,400 meters for the Belisknir and 1,500 meters for the O'Neill.  The Daniel Jackson appears to be about 750 meters long, compared to a 'new' Ha'tak.

4. The Stargate DVD Collection claims 27 meters for Fifth's Replicator ship!  Which is utterly ridiculous!  At that size, given its design, there wouldn't be room inside it for the cell Fifth held Carter in!  Based on its apparent size compared with the Asgard ships, I would say it's around 1,500 meters long.  Though it might be larger.

5. Most chart makers seem to agree that the Ancient Aurora class is quite large, but individual charts vary widely on the exact figure.  Though these usually range between 2-3.5 kilometers.  It's interesting to note that these chart makers accept a large Ancient Warship while also accepting a tiny Daedalus.  Comparing the Ancient Warship to my 586 meter Daedalus, it appears the Ancient ship is approximately 2,400 meters long.

6. Another downright comical claim of the Stargate DVD Collection is the dimensions of the Ori mothership.  Claiming this obviously huge vessel to be only 1.1 kilometers long would be bad enough...but it goes on to specify the width and height of the ship.  And gives an illustration.  Relative to the length, the stated height is far too great and makes their illustration of the Ori ship look quite bizarre!
    Sadly, most chart makers simply accept the 1,100 meter figure, while apparently ignoring the fact that even their ~700 meter Ha'tak looks huge by comparison.  My own analysis, comparing the Ori ship to the Supergate, the new Ha'tak & the Asgard O'Neill leads me to place its probable length at around 3,500 meters.

7. Apophis' Flagship is another ship which is often shown on other charts to be comically under sized.  The silliest I've seen is a suggested width of only 1 kilometer!  Which makes it look pathetic even compared to a ~700 meter Ha'tak.  Another size often given is 2.2 kilometers, which is admittedly better...but still too small.  Yet another is 3,325 meters - this size actually approaches reason, especially given a 700 meter Ha'tak.  But, it doesn't look as good compared to an accurate 1,000 meter Ha'tak.  My own estimation gives this ship a total length of 4,890 meters.
    I should also note that Apophis' ship has been alternately referred to as a Ha'tak, a battleship/dreadnought and a System Lord Flagship...though there's no evidence to support the idea other System Lords had one.  I've personally taken to calling it the Necropolis class.  Partly because Sokar was pretending to be the Devil, and city of the dead fits with that.  And because in Egyptian myth, Apophis was closer in theme to the Devil than Sokar.  And because it's the size of a city and when SG-1 boarded it in "Enemies," it was full of dead Jaffa!

8. Anubis' Flagship has had more screen time and this may explain why its size is the same in most charts...or it could be that the chart makers just copy each other without investigating.  I have seen it listed as only 2 kilometers once, but generally it is listed as 5.5 kilometers, which is remarkably accurate.  I'm almost tempted to just agree with everybody else.  But, my own calculations suggest a figure of 5,800 meters.
    Much like Apophis' ship, Anubis' vessel has been referred to in many ways; super Ha'tak, battlecruiser, super weapon ship...that last one is sort of accurate, of course.  But I like the idea of giving it an actual name.  In "Continuum," Ba'al had a flagship of this design.  And Ba'al himself -as the Supreme ruler of the Goa'uld- was referred to as the 'Sovereign'.  Therefore, I've taken to calling this the Sovereign class.  This name is frequently used for big ships; the Enterprise E, the Sovereign SSD.

Notes on Farscape ship sizes:
1. Moya suffers from the usual SFX problem of being different sizes in different shots.  But, one way to establish a reasonable size is to measure the opening of her hanger and consider how large it must be and therefore how large Moya must be to allow docking of the largest of the small ships that has been shown docked aboard her.  The largest of these is the Nebari Pod.
    At first, I believed that Moya must be around 1 kilometer long...but then I realized I was measuring her birthing chamber and not her docking bay!  Re-calculating placed her length at about 1,500 meters - the same figure Dan Carlson lists.  Either way, Jeff Russell's figure of 650 meters is far too small.  Of course, I recently re-evaluated my size for the Nebari Pod.  I have yet to check to see if the 1.5 kilometer figure still works with this new consideration.

2. The Vigilante has been seen in close proximity to Moya and its relative size can be fairly accurately measured.  Jeff Russell lists its length as 535 meters, which makes sense given his 650 meter Moya.  Bizarrely, while Dan Carlson's Moya is 1,500 meters, his Vigilante is only 550 meters.  My own calculations based on a 1.5 kilometer Moya suggest the Vigilante is 1,125 meters long.

Notes on Andromeda ship sizes:
1. Both Dan Carlson and others list the Nietzschean Battlecruiser as being around 1.2 kilometers long.  While I agree that some SFX shots make it look that big, others do not.  My first estimation, based on its apparent size compared to the Garuda class fighter placed its length at about 800 meters.
    However, some sequences such as the battle of Witchhead clearly point to a size of around 500 meters, here I find myself in agreement with Dirk Loechel.  Although, I freely admit that it could easily be slightly bigger - say 600 meters or so.

2. To the best of my knowledge, we never saw the Siege Perilous class in the same frame as Andromeda.  Based on the Siege Perilous class being even more bad-ass than the Andromeda, one might naturally expect it to be larger.  And indeed, Dan Carlson and others show it at around 1,500 meters.  Of course, the Pyrian Torchship used practically the same CGI model and was 2 kilometers long.
    If I'm not mistaken, one of the old Andromeda sites claimed the official size of the Siege Perilous to be 666 meters.  This is the size Dirk Loechel lists for it, as do I.  One assumes there is meant to be symbolism in that length.

10 Meters Per Pixel

    The 10mpp chart features everything from the 350 meter Borg Probe to the 17,600 meter Executor class Super Star Destroyer.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. The Borg Probe length is estimated based on the fact that the ship appeared virtually the same length as Voyager.  Dan Carlson lists it as 400 meters.  Either could be correct.

2. Dan Carlson lists two types of Borg Sphere.  My size matches the Sphere from "First Contact," as does the smaller of the two he lists.  Some of the encounters with Spheres in VOY -notably "End Game"- do seem to indicate a larger version.  But I will not include it until I've done a more thorough investigation.

3. Dan Carlson lists the Borg Diamond at 820 meters.  I have not done a close analysis, yet.  But, it should be noted that charts quoting this size seem to be measuring width - and are using a picture of the Diamond which is at an angle making it appear less wide than it does tall.  The picture I use is of a better angle, and while it is still taller than wide, the difference is much less.  I am also calculating by height.  Therefore, my figure of 1 kilometer is much closer to the other charts than it might first seem.

Notes on Star Wars ship sizes:
1. The Executor has a long history of being misrepresented.  This goes back to West End Games' bizarre declaration that the SSD was only 8 kilometers long - 5x the length of an ISD.  As Lucasfilm was very impressed with the over all quality of WEG's RPG, they had authors writing Star Wars novels use the RPG materials as background information.  This led to near canonization of the 'Five Mile Fallacy'.
    Beginning in the late 90s, around the time WEG lost its Star Wars license due to the financial shenanigans of one of their executives, StarWars.com effectively retconned the length of the Executor to 12.8 kilometers - 8x the length of an ISD.  If I remember correctly, it may have been briefly retconned again to 16 &/or 17.6 kilometers.  Eventually, though, it was retconned to the current 'official' size of 19 kilometers - 11.875x the length of an ISD.
    On screen 'evidence' varies - some SFX shots make the Executor look about 17.6 kilometers long, while others can make it look up to 25 kilometers long!  However, a careful analysis of the command towers of the ISD & SSD shows that 17.6 kilometers is the best match.  Furthermore, John Dykstra -who actually designed the thing- expressly stated that it was designed to be 11x the length of the ISD - 17.6 kilometers.

Notes on Stargate ship sizes:
1. Most charts don't include the Ori Supergate, and those few that do usually get it wrong.  Probably this can be explained by the chart makers accepting the silly 1.1 kilometer figure for the Ori ship.  But there is another issue - the first Supergate seen in "Beachhead" was much smaller than the finished Supergate in "Crusade."  The pieces of the first Supergate were sent through a regular gate, which severely limits their possible size.
    However, when Vala flew a Tel'tak into the ring of the forming Supergate to sabotage it, the pieces had become larger than the Tel'tak!  Which, by the way, could not be explained even if you accept a 15 meter Tel'tak - so let's not even go down that dead end road!  But, in "Crusade" Carter was standing on one of the Supergate sections and it was huge - far larger than those of the first Supergate, even after they magically grew!
    The only possible explanation (other than a massive f***-up in the SFX department) is that the Supergate sections were somehow compressed to fit through the regular gate and were in the process of decompressing in "Beachhead," and were fully uncompressed in "Crusade."  At any rate, based on the scene where Carter is standing on it, and the size it would need to be for the Ori ships to pass through it, I estimate the Supergate as approximately 2,300 meters in diameter.  This measurement works both ways, of course, helping to establish the probable length of the Ori ships.

2. The Ancient City Ship, Atlantis, is alternately shown at many sizes.  4,500 meters by Dan Carlson.  3,750 meters by Dirk Loechel.  And around 3-4 kilometers by various others.  I once would have agreed to something similar, but there are a few points to consider.
    If one measures the central tower of the city in the various close ups it has had - Puddle Jumpers flying out of it, the gate room exploding, people crawling along its outside...it isn't that big.  Then compare that to wide views of the city, and the whole thing is absurdly small.  This approach and its inconsistencies must be thrown away as the SFX f***-up it obviously is.
    Instead, we stick with comparisons which are to do with the city as a whole.  There are some to work with; an Aurora class attacking the fake Atlantis, the real Atlantis doing battle with the Superhive.  Also, we know that the city must have a flat landing area large enough for the Daedalus(586 meters) to park.  Plus, at some scales, some of the buildings would be too small to have anything useable in them!
    Taking all these things into consideration, the best fitting figure I could come up with was 6,500 meters.  The size discrepancy of the central tower must simply be ignored, for it would be so at virtually any scale that made sense for the over all size of the city.
    Remember: it is a city.  Not a flying village or hamlet, a flying city.

3. The Wraith Hive ship is often listed as almost comically small on many charts.  I've seen figures as small as 3 kilometers, but 3,291 meters is quite common - Dan Carlson uses this figure.  I've also seen it listed as 6,750 meters.  Dirk Loechel gets it right - 11,000 meters.  This is the size claimed by the CGI artist who designed the Hive ship.
    It should be noted, however, that just like the Ha'tak, the Hive ship has had two different models & sizes used on screen.  While the first model was sometimes reused, however, the original scale was never seen after season 1.  In "Letters from Pegasus," the Hive ships appeared much smaller relative to their cruisers than they did from season 2 onward.  This brief appearance may explain the ~3 kilometer figure that is so often used.

4. The regular Hive ship is 11 kilometers, however, I've seen the ZPM powered Hive ship listed as this size least once.  But, I've also seen it listed at the ludicrously small size of 3.5 kilometers.  With so little screen time and nothing to compare it to except Atlantis -mostly from unfortunate angles that make comparisons difficult- it's very hard to say for sure how big the ZPM Hive ship is.
    However, we do know that it was an ordinary Hive that had grown a much thicker outer hull - so it's not like it could be twice as long or anything.  And, it more or less appeared to be around twice the size of Atlantis.  Therefore, my best guess is 13,000 meters.  To a certain extent, this also validates my size for Atlantis - it appeared to be about half the size of the ZPM Hive, and since a regular Hive is 11 kilometers, Atlantis couldn't reasonably be as small as most other charts claim.

Notes on Farscape ship sizes:
1. The second of the two official charts on the Peacekeeper Wars DVD shows the relative sizes of the Vigilante, Moya, the Scarran Decimator, the Peacekeeper Command Carrier & the Scarran Dreadnought.  These relative sizes appear to fit rather well to what is seen on screen.  Therefore this chart, at least, appears to be a good reference.
    Working from the assumption of a 1,500 meter Moya, the Scarran Decimator appears to be 3,750 meters long.  Dan Carlson shows it as 3,400 meters, while Dirk Loechel lists it as 3,000 meters.  Strange, since both of them show Moya at about the same size as I do.

Notes on Other ship sizes:
1. The defunct Space: Above and Beyond tech manual site listed the Chig Mothership as 470 meters long and 2,205 meters tall.  The problem there is that those two figures don't work together.  Like Dan Carlson, I chose to accept the 470 meter figure.  Accepting the height figure would make it ridiculously huge compared to the Saratoga.

20 Meters Per Pixel

    The 20mpp chart features everything from the 350 meter Borg Probe to the 27,000 meter Peacekeeper Command Carrier.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. Both the Farpoint Lifeform & the Crystalline Entity sizes are estimated based on comparison to the Enterprise D.

2. The size of the Chodak Dreadnought is a rough estimate based on my recollection of its approximate scaling in the game Star Trek The Next Generation: Birth of the Federation.

3. The 'Pod ship' from Star Trek The Animated Series is based on a comparison with the Enterprise.

4. The Fesarius from Star Trek The Original Series is general shown to be 1,600 meters in diameter.  While most fans accept that figure, some -like myself- don't feel that it fits with the apparent size of the ship compared to the Enterprise in "The Corbomite Maneuver."  Based on what was seen of it on screen, 3,200 meters seems more reasonable.

5. The Borg Tactical Cube is listed by most people (who show it at all) as ~1,500 meters wide, roughly half that of a regular Cube.  I suspect that the 1.5 kilometer figure is based solely on comparison to Voyager on screen.  But that scene is clearly another example of the SFX folks' need to play with scaling so it looks good for the audience.
    Personally, I feel that the Star Trek Armada games are more accurate in spirit - the Tactical Cube is supposed to be a more heavily armed & armored version of the regular Cube.  I based my measurements on the idea of starting with an ordinary Cube and adding the big armor panels to the outside of it.  The result was 3,288 meters in height, which turned out to be greater than the width.

Notes on Star Wars ship sizes:
1. The Eclipse class Super Star Destroyer, featured in the Dark Empire comics was introduced to us as being 10 miles
(16 kilometers) long.  It is highly doubtful that this was mere coincidence - at that time, the official length of the Executor was still five miles (8 kilometers).  Almost certainly, the Eclipse was meant to be twice the length of the Executor.  Oddly, WEG retconned the length of the Eclipse to 17.5 kilometers in the Dark Empire sourcebook.
    The official length of the Eclipse still stands at 17.5 kilometers, though the Executor has been retconned to a length of 19 kilometers.  If the Eclipse were to be proportionally re-sized to match the 19 kilometer Executor, it would be 38 kilometers long!  Strangely enough, this would actually make its axial superlaser closer in size to one of the Death Star's 'tributary' lasers; which the Eclipse's superlaser is said to be as strong as.

Notes on Babylon 5 ship sizes:
1. The Thirdspace Cruiser is generally listed as 2 kilometers long.  I list it as 2.4 kilometers, which is the scale stated by the fan site where I found the illustration I use.  Either size could be correct.

2. If I remember correctly, I believe the B5 tech manual listed the Centauri Starbase as 4 kilometers in size.  Regardless, I know I came across that figure somewhere.  I assumed this figure to be its height including antennae, because otherwise it looks unrealistically huge.

3. The Thirdspace Dimensional Gate is never seen close enough or at a good enough angle to other ships to properly calculate its size.  However, Ivanova did mention that it was almost as big as an Explorer ship.  Its clear, given their relative designs, that the Gate must be more massive than an Explorer.  But I assume she was talking length, therefore I used a figure of 5 kilometers, including its lower antennae.

4. One would think that the titular Babylon 5 station's size would be well agreed upon.  But you'd be wrong.  True, most people use the 8,454.1 meter size.  But the B5 tech manual, which many use as a source for their size figures, lists the station as 8,064.5 meters long.  Weird.  I'm not clear on the origin of the two figures.
    (Jeff Russell quotes the larger figure, but claims to get it from the B5 Tech Manual site, which lists the smaller one.)

Notes on Farscape ship sizes:
1. Ah, the Peacekeeper Command Carrier.  Oh boy, there are so many notes to make on this one.  Let's start with the smaller sizes and work our way up.  But first, a few facts: the PKCC has a crew of "over 50,000", it has vast park like areas - the ceiling of which is so far away it is hazy, it has hangers that can accommodate ships up to "1 kilometer" in length, it is "over a metra long" and its main weapons have a maximum range of "45 metras."
    During Farscape's run, a "metra" seems to be a unit of distance that changes depending on use.  When the PKCC is said by Rigel to be "over a metra long," everyone(fans) assumes it to be a kilometer.  But, when the characters are on a planet and discuss things in walking distance as being 600 metras away, one assumes meters...  To be frank, this is obviously one of those moments when dialogue is just useless as a reference.  At least, in and of itself.
    The Farscape RPG claimed that the PKCC was 1 kilometer long.  Of course, it also claimed that Leviathans -like Moya- were over a kilometer long.  So, we can safely dismiss the RPG as anything remotely realistic.  There is one extrapolation that can result in a just over a kilometer figure...if the PKCC bridge set is meant to be analogous to the 'nose cone' on the CGI model, then the apparent size of the PKCC would be 1 kilometer or just over.  But this is far removed from so many other things we've seen it just can't work.
    A member of the Farscape production team has been quoted as saying that he was disappointed that they failed to establish in the first episode that the PKCC was 5 kilometers long.  This is kind of like getting an 'official' word on the subject...but not quite.  And it still doesn't fit with everything we've seen.
    Jeff Russell lists the PKCC as 8,701.429 meters long.  Oddly precise.  But again, this doesn't fit very well with what we've seen.  Though, it certainly comes closer than anything so far.  Dirk Loechel lists the PKCC as 10,202 meters long.  Again, this seems oddly precise.  And I have no idea where they came up with these figures.
    Dan Carlson previously listed the PKCC as 21,000 meters long.  On his latest update, he upped this to 23,000 meters.  This is finally in the ballpark of reason.
    As I've said previously, the second of the two charts that came with the Peacekeeper Wars DVD appears to fit perfectly well with what is seen on screen.  My own calculations based on this chart -assuming a 1,500 meter Moya- indicate that the total length of the PKCC is 27,000 meters.  This fits with what we've seen in "Into the Lion's Den" & "The Peacekeeper Wars."
    Plus, the wreck of the Zelbinion in "PK Tech Girl," Scorpius' fleet engaging the Scarrans and his disabled Carrier hanging in the skies over the water planet in "The Peacekeeper Wars" all showcase the enormity of these vessels.
    Going back to the dialogue for a moment, if a metra were about 20-25 kilometers, then the range of the frag cannons would be around 1,000 kilometers - much more reasonable than a mere 45 kilometers.
    As to those who say 50,000 crew is not enough for such a massive ship...there are many possible explanations for this.  The wide spread use of DRDs could indicate that the ships in Farscape are heavily automated.  Also, consider the massive open areas inside the ship - the hangers, the recreation/training planetscapes, the huge power room...even just the high ceilings in much of the crew areas speaks to the fact that this ship has room to spare.
    Additionally, it is possible that the 50,000 figure only includes the permanent crew of the Carrier itself.  It may not include the crews of the dozen or so escorting Vigilantes, the dozens or hundreds of Marauders and the hundreds or even thousands of Prowlers - the crews of which would need space aboard the carrier to spend their off hours.
    And, a final argument to support the huge size of the PKCC...  Unlike other militaries, the Peacekeepers spend their entire lives from birth to death in space, aboard their ships.  Yes, they control many planets.  And they maintain at least some ground facilities.  But the Peacekeeper design philosophy seems to be geared towards mobility.  The PKCC represents everything they need; defense, attack, habitat, training, repair & resupply, possibly even construction.
    And the fact that they have a fleet of at least dozens & probably hundreds of these monster vessels gives us some idea of the resource base that the Peacekeepers obviously command.

50 Meters Per Pixel

    The 50mpp chart features everything from the 600 meter Borg Sphere to the 65,000 meter Starforge.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. Dan Carlson lists the height of the Utopia Planitia station as 1,200 meters.  Where he came up with such a ludicrously small figure I can't imagine.  (He also calls it an orbital habitat for some reason.)
    I estimate its height at 9 kilometers.  Why?  Allow me to explain...
    The Enterprise D was constructed at Utopia Planitia.  Unlike JJ Abrams, the real Star Trek never did something as nonsensical as building its ships on the ground!  In the TNG episode "Booby Trap," Geordi creates a holographic version of the drafting room at Utopia Planitia.  Through the viewports of the drafting room, a partially completed Galaxy-class starship -presumably the Enterprise D- can clearly be seen, as well as spacedock-style space doors.  The dark rectangles on the upper & lower sections of the station are the space doors.  Scaling them to be wide enough to allow the passage of a Galaxy-class starship, results in an overall height of about 9,000 meters.
    While it is sadly offline, if I remember correctly, the DrexFiles hosted an image of the Utopia Planitia station and referred to it as a 'Spacedock'.

2. Bernd Schneider, of Ex Astris Scientia, prefers to disregard the obviously larger version of the spacedock type station that appears in The Next Generation.  Meanwhile, Dan Carlson lists Starbase 74 twice - once on his Trek-only stations chart at 8,800 meters in diameter, and again on his huge general sci-fi chart at 8,781 meters in diameter.  My own analysis yielded a result of 12.5 kilometers in total height.  But for this chart I listed it as 8.8 kilometers in diameter - which works out to about 12.6 kilometers in height.

Notes on Star Wars ship sizes:
1. The Titan class Star Destroyer is, as far as I know, primarily a fan creation.  If I remember correctly, Curtis Saxton identified the ship as a class from the various background ships in one of the comics.  His estimate of its size was 3.1 kilometers.  EvilleJedi, whose 3D model of this ship is used in many EaW mods, has made a chart or two of his own models.  In one of them, his Titan appears to be shown at 3.2 kilometers.  A post on ZetaBoards claims 4.1 kilometers.  In the absence of any real data, I simply averaged these and rounded up to 3.5 kilometers.

2. The Revenge class Heavy Carrier Relentless is featured in the I.M.P.S. series of fan films.  Although flying in close formation with several star destroyers, its hard to tell its size - partly because its hard to tell if the destroyers are meant to be Imperial class vessels or something else.  The only source I could find was a fan run cross-franchise RPG site.  Not the best source, perhaps, but when you've got nothing else...

3. The Sovereign class Super Star Destroyer also featured in the Dark Empire comics, though in a background role.  It has never been retconned from its original 15 kilometer length.  If it were proportionally scaled up to match the new 'official' 19 kilometer Executor, it would be 35,625 meters long!

4. The Eclipse II, also from the Dark Empire comics, was the clone Emperor's replacement flagship for the first Eclipse.  Its design makes it slightly less massive, though both ships were the same length - 16 kilometers.  Unlike its predecessor, the Eclipse II was never retconned, thus its length remains 16 kilometers.

5. The Starforge is another figure I had to rely on the RPG site for - apparently video gamers don't care how big something is as long as it looks cool.  Whether the figure is accurate, I have no idea.  You'll notice that it was so large I couldn't get it to completely fit on this chart.

Notes on Babylon 5 ship sizes:
1. My figures for the First Ones are very rough guesses based on their brief appearance in early season 4.

Notes on Farscape ship sizes:
1. The Scarran Dreadnought is not often included by other chart makers.  Dirk Loechel lists it as 12,208 meters long.  Just like his PKCC figure, this seems oddly precise.  And I can't imagine how he got it.  Dan Carlson previously listed this ship as 25 kilometers long, and now lists it as 28 kilometers long.  My own analysis, based on the second of the two official charts on the Peacekeeper Wars DVD, (and assuming a 1,500 meter Moya) resulsted in a figure of 32,250 meters for the total length of the Scarran Dreadnought.

100 Meters Per Pixel

    The 100mpp chart features everything from the 1 kilometer Borg Diamond to the 160 kilometer Death Star II.  Most sizes are taken from other sites, notes on those that are not appear below.

Notes on Star Trek ship sizes:
1. Dan Carlson lists the Caretaker's Array as 4,500 meters across.  Nearby, he lists the Kazon Predator class as 1,800 meters long.  However, comparing the Array to the Predator that crashes into it in "Caretaker," leads me to conclude that the Caretaker's Array is more like 20 kilometers across.  And this isn't even the structure's greatest dimension - its 'length' is even greater than its width.  But, the only picture I have to illustrate this is a top view, so it was not included.

2. Jeff Russell lists the Whale Probe from Star Trek IV as being 74 kilometers long.  (It should also be noted that his graphic depicts the Probe as shorter & fatter than it appeared in the movie.)  Jeff Russell also notes that there are multiple, conflicting sources for the object's length, and that his was extrapolated from the film as most likely.  Exactly which shots in the movie he used for comparison, I do not know.
    Dan Carlson previously listed the Whale Probe as 90 kilometers long - which might fit with the Earth Spacedock, if the Spacedock were as big as Starbase 74.  Now, however, he lists it at a mere 8 kilometers long - which is absurdly small.  Possibly, this could be explained by comparing the Probe to the Miranda class vessel which was the first UFP ship disabled by it.  (It should also be noted that his graphic depicts the Probe as longer & thinner than it appeared in the movie.)
    My graphic is an edited version of the one used by Dan Carlson - I 'shortened' it slightly.  At first I was going to halve the difference between Jeff's & Dan's figures, and say 86 kilometers.  But, as the Probe passes close to the Earth Spacedock, it appears that the thickness of the cylinder is more or less equal to the height of the station.  So I cut my figure in half, to 43 kilometers.  This is, in my opinion, fairly close to accurate.  It might be smaller, say 40 kilometers.

3. Jeff Russell lists the physical V'Ger ship as 98 kilometers.  The amazing graphic was drawn by Jeff himself.  Dan Carlson lists the craft as 78 kilometers.  I have not done my own analysis, but -given the gargantuan energy cloud produced by the ship- I prefer the larger of the two estimates.
    Here, I agree with Jeff Russell.  Though, I will note that he incorrectly identifies Star Trek The Motion Picture as coming out in 1982.  The Wrath of Khan came out in '82, The Motion Picture came out in '79.

Notes on Star Wars ship sizes:
1. The Inquisitor & Malevolent class Super Star Destroyers are listed here just for fun.  They are fan designated classes and sizes, based on concept art for the Executor.

2. And now for some Warsies' fan-wank controversy!  Most chart makers don't include either of the Death Stars in their charts.  And perhaps this is avoid a possible flame war with some SW fans...
    Curtis Saxton, of Star Wars Technical Commentaries fame, is guilty of starting -or at least popularizing- this bit of fan-wankery.  His analysis of RotJ, comparing the various SFX shots of the Death Star II, led him to conclude that the second Death Star is at least 900 kilometers in diameter.  (For reasons I'm not too sure of, the same fans that insist DS2 is 900 kilometers wide also insist that DS1 is 160 kilometers wide.)
    Jeff Russell links to Curtis Saxton's work, but lists the official sizes of 120 kilometers for DS1 & 160 kilometers for DS2.  These are correct.
    I really don't want to give this topic more time than it deserves, but I will point out a couple of things real quick.  First, as I have to keep reminding people, the folks in charge of the SFX shots -and indeed the show/movie as a whole- are only concerned with making a product that will sell.  They do not spend their nights doing calculus equations, trying to make sure that everything fits perfectly together!
    If the Death Star II looks too big compared to the Endor moon, then just accept that the SFX were poorly done and move on.  Furthermore, a comparison of ships of known size docking aboard the Death Stars to the equatorial trenches, then comparing the trenches to the overall stations...results in figures that are more less equal to the official sizes of 120 kilometers & 160 kilometers, respectively.
    In my opinion, this type of comparison makes more sense than the wild assumptions that Curtis Saxton engaged in.

Notes on Babylon 5 ship sizes:
1. The Vorlon Planet Killer is listed by Jeff Russell, Dan Carlson & the B5 Tech Manual as 45 kilometers long.  The B5 Tech Manual notes the line of dialogue saying "three or four miles across" and points out that this could refer to the 'thickness' of the VPK.  They certainly could not be a mere 5-6 kilometers long, because this is flatly contradicted by what is seen on screen.
    Dirk Loechel is an outlier here, listing the oddly precise figure of 6,437 meters for the VPK.  This is totally inaccurate, as can be seen by comparing his VPK to the Star Dreadnaught right beside it.  The VPK was clearly much, much larger on the show.
    However, I must disagree with 45 kilometers.  Why?  Because, that figure assumes a 1,330 meter Star Dreadnaught.  Based on my belief that the Star Dreadnaught is actually 2,000 meters long, I place the total length of the Vorlon Planet Killer at 68 kilometers.

Notes on Other ship sizes:
1. The Guild Heighliner shown here is the design from the Sci-Fi Channel minseries, not the classic 80s movie of Dune.  The 10 kilometer figure comes from some of the Dune books, but not from Frank Herbert, thus probably not canon.  Both Dan Carlson & Dirk Loechel list this design as 20 kilometers long.
    I can't speak to the size of the re-imagined Heighliner.  And I don't have a good graphic for the original 80s version.  However, looking at the 80s film...  I estimate a width of approximately 180 meters for the Atriedes transport.  Careful analysis of the HD version of the original film, shows the 'door' that the transports fly into to be in excess of 3 kilometers tall.  Close inspection of the door's apparent size compared to the overall size of the Heighliner indicates a total Heighliner width of around 18 kilometers.  A rough estimation of the Heighliner's width to length ratio would seem to indicate a total length of about 100 kilometers.

    I hope you enjoyed my commentaries.  And perhaps you've come away wiser than you were before.  Or, maybe you think I'm totally wrong on some point.  Or several.  Or all points.  Regardless, I've done my best to give you my reasonable, non-biased opinions.  In my experience, anyone who admits to being a fan of one franchise but not others can't be counted on not to be biased in favor of their preferred franchise.  As a fan of all of them, I hope my opinion is more balanced.
    If you care to discuss scale related topics, feel free to post in the forums.  (But, any flames will be deleted.)

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