Venus is the third smallest planet in the solar system and is around 95 percent of the total size of the Earth. Both Earth and Venus are dwarfed by the largest planet in the solar system, Jupiter, which is more than 13 times their size.
Saturn, the second largest planet in the solar system, has a diameter of 116,464 km. That is more than 10 times the size of Venus, as its diameter is only 12,104 km. In comparison, the Earth has a diameter of 12,756 km. Like Earth and Venus, Neptune and Uranus are quite close to the same size. Uranus is about 1.3 times of the size of Neptune, and its total diameter of 50,724 km is more than four times larger than Venus.
The smallest planet in the solar system is Mercury, which only has a diameter of 4,780 km. Mars is the second smallest, with a diameter of 6,780 kilometers. Before it was reclassified as a dwarf planet, Pluto used to be the smallest planet in the solar system, with a diameter of only 2,800 km. There are actually two moons in the solar system that are larger than Mercury. Both Saturn's moon Titan and Jupiter's moon Ganymeade are slightly larger than Mercury.