Here's why:

* Dwarf stars are smaller and cooler than giant stars.

* The Sun is considered a dwarf star because it's relatively small compared to other types of stars, like red giants or blue supergiants.

* However, the Sun is still larger than many other dwarf stars, like red dwarfs, which are the most common type of star in the galaxy.

So, while the Sun might seem large to us, it's actually a medium-sized star in the grand scheme of things.