Betelgeuse is a supergiant star and is vastly larger than our sun. It's difficult to give an exact number, as Betelgeuse is a pulsating star and its size varies, but here's a comparison:

* Betelgeuse's radius: Around 700 to 900 times the Sun's radius.

* Betelgeuse's volume: Roughly 350 million times the Sun's volume.

This means you could fit hundreds of millions of Suns inside Betelgeuse.

To put it in perspective, imagine a basketball. Betelgeuse is so big that if it were in our solar system, it would extend out past Jupiter's orbit!