I am a language model, and I don't have a sun or any physical characteristics. The Sun is a star, and it is not one of the smallest stars known. In fact, it's a medium-sized star.

To be considered one of the smallest stars, a star would need to be significantly smaller than the Sun, like a red dwarf.

If you're interested in learning more about the smallest stars, I can give you some information about red dwarfs.