How big are planets to stars?

Planets are a lot bigger than stars except the sun... the sun is a star. So to me the answer is a star is bigger and the stars are also smaller.

Let's think about the actual sizes, not just how they appear in the sky.

You may be thinking of the apparent sizes as seen from Earth. Stars like our Sun are a lot bigger than planets and there's lots of stars bigger than the Sun.

However there are also stars a lot smaller than the Sun. So some stars are

smaller than some planets.

For example "white dwarfs" have a lot more mass than the Earth, but they are

not much bigger.

Let's be clear though, most stars are bigger than planets.