No, the sun will never be smaller than the Earth. The sun is actually growing. It will do so until it actually becomes so hot that nothing will be able to live on the surface of the Earth. That will take billions of years however.
Smaller, Mars is about half the size of Earth
The moon is much smaller, about 1/4 the diameter of Earth.
There are 8 planets Mercury (smaller than Earth) Venus (smaller than Earth) Earth Mars (smaller than Earth) Jupiter (bigger than Earth) Saturn (bigger than Earth) Uranus (bigger than Earth) Neptune (bigger than Earth) so 3 smaller & 4 bigger than Earth 37.5% smaller than Earth 50% bigger than Earth
There are 8 planets Mercury (smaller than Earth) Venus (smaller than Earth) Earth Mars (smaller than Earth) Jupiter (bigger than Earth) Saturn (bigger than Earth) Uranus (bigger than Earth) Neptune (bigger than Earth) so 3 smaller & 4 bigger than Earth 37.5% smaller than Earth 50% bigger than Earth
Mercury is more than 2x smaller than Earth.
It is smaller than earth.
Venus is slightly smaller than Earth.
Mercury is smaller than earth.
Earth is smaller than Neptune but larger than Venus.
Mercury is almost the same size as the Moon. The Moon is smaller than Earth. Mercury is then smaller than Earth.
Asteroids are much smaller than Earth.
Titan is significantly smaller than Earth.