How big is Santa Maria?

Over on UnmannedSpaceflight.com, the roverists have been hard at work to graphically illustrate the answer ... fredk created a graphic using the recently colourised panoramic image of the crater made by fellow UMSF member and image magician James Canvin, and put some human figures [aka the Mystery Men] on it to the correct scale. That inspired USMF member and rover poet Stuart Atkinson, to add an "Opportunity" next to each Mystery Man, also to the correct scale and voila.