* Red Supergiants: Some of the largest known stars are red supergiants. They can be hundreds of times larger than our Sun in radius.

* Betelgeuse: This famous star in Orion is about 950 times the Sun's radius. If it were in our Solar System, it would extend past the orbit of Jupiter!

* Hypergiants: Even larger than red supergiants are hypergiants. These are incredibly rare and short-lived.

* UY Scuti: This star is considered one of the largest known, with a radius estimated at about 1,700 times that of our Sun. It would reach nearly halfway to Saturn if placed in our solar system!

Important Note: These are just estimates, as it's very difficult to measure the size of stars accurately. However, even these rough estimates show the sheer scale of some stars compared to our Sun.

Here's a simple analogy:

* If our Sun were a basketball, the biggest stars would be like giant blimps or even skyscrapers!