They are small
Mercury is the smallest of the eight planets.
Mercury is the smallest of the eight official planets, then there are dwarf planets that are smaller.
Mercury is the smallest of the terrestrial planets.
Of the Jovian (gas giant) planets, Neptune is the smallest while Jupiter is the largest.
Mercury is the smallest planet of all.
The smallest gas planet is Neptune.
Mercury is one of the four inner terrestrial planets, or rocky planets. It is the smallest of the four and closest to the sun. It is also the smallest of all eight planets.
Mercury is the smallest of the terrestrial planets.The others in order after Mercury:MarsVenusEarth
The 4 smallest planets are also the 4 most inner planets: Mercury, Venus, Earth and Mars.
Mercury is the smallest of the inner planets and the closest to the sun in our solar system.
10
the least common denominator