How Big Is That Starship?

DeviantART user dirkloechel put together this huge comparison chart of almost every sci-fi ship ever:

So cool! I lost quite a bit of productive time staring at this (and nerding out over seeing the Soveriegn-, Eclipse-, and Executor-class Star Destroyers side by side in the upper left).

If you're into this sort of thing, you should also check out this interactive spaceship comparison website, which accommodates even large vessels (like Larry Niven's Ringworld).