Eris is not a planet; it is a dwarf planet. It is much smaller than Earth.
Mars is the only planet which is both smaller and colder than the Earth.
Eris is not a planet; it is a dwarf planet. It is much smaller than Earth.
Pluto is the dwarf planet that is smaller than the Earth's moon.
Smaller.
Venus is only slightly smaller than Earth.
Venus. It is just a bit smaller than Earth.
It is a rocky planet that is much smaller and colder than earth.
It is smaller than Earth.
Pluto, which is no longer considered a planet, is made of rock and ice and is smaller than Earth's moon.
Venus is only a little bit smaller than Earth.
Mercury, Venus and Mars are all smaller than the Earth. If the question is referring to the US as in the US of A, then no planet is smaller.