Molecular astrophysicist "Invader Xan" has created an infographic, "Model spaceships", comparing the sizes of various space-faring vessels at Supernova Condensate.
Why? I'm not sure where you got lost when I said, "spaceships".
And you know what? S/he/It's blog has great stargazing tidbits like, "How to diffract a Cadbury’s creme egg…?" and including killer images of the Venus-Sun transit. You are not aware of my penchant with Venus-Sun porn? Then you are not following my Twiterfeed.
Xan has also included bonus material (above) comparing fictional and non-fictional craft. [via Discover Magazine]