Here's why:
* The Sun is a star. It's our own star, the one closest to Earth.
* Stars come in many sizes. There are stars much larger than our Sun, and some much smaller.
To make a comparison, you need to specify which star you're comparing the Sun to.
For example:
* The Sun is about 100 times wider than the Earth.
* The Sun is about 10 times smaller than the star Betelgeuse.
Let me know if you'd like to compare the Sun to a specific star!