The planets are all different colors and sizes. Like the Sun compared to Pluto. Well the Sun is 625 times larger than Pluto. But when you compare the Sun with Jupiter the sun is only 9.68 times larger than Jupiter. When you compare Jupiter with Pluto, Jupiter is 62.5 time larger than Pluto. The only planet that is almost exactly the same size of earth is Venus. The Earth is 12756km and Venus is 12104km. Two other planets that are almost the same size are Uranus and Neptune. They are both blue and Uranus is 51152km and Neptune is 49620km. Thats not a big difference. All the Planets are different sizes but some of them are pretty close to each other.