In terms of volume compared to the Earths volume;Jupiter = 1321.3 times bigger Saturn = 763.6 times bigger Uranus = 63.1 times bigger Neptune = 57.7 times bigger
Mars is the second smallest planet, Mercury is the smallest. So out of the eight planets, it is comparitively small. Mars' diameter is about half that of Earths. The Gas giant planets are much larger...
Dear questioner,
It is extremely small to all other planets in the solar system, excluding Pluto who was just given the boot! It is very close to the sun and it has NO atmsphere, so it has one...