How Big Was the Apollo Spacecraft Inside?

The Command Module was a truncated cone measuring 10 feet 7 inches tall, with a diameter of 12 feet 10 inches across the base, and a volume of 218 cubic feet (the same interior volume as two midsize American cars). Room for three astronauts with their legs stretched out (unlike Soyuz, where your legs stayed bent for the entire mission). The Lunar Module was more spacious. The crew of only two could luxuriate in a cabin volume of 235 cubic feet (the same interior volume as two large American cars). Of course, both space vehicles were also packed with equipment, so the astronauts weren't exactly rattling around in there.

Images of Apollo capsule interior and lander exterior from How Stuff Works and Wikipedia.