My breasts are bigger than my friends' ones

Okay so this is totally normal because everyone is different, and bodies grow in all kinds of ways and at their own speed.

Like, some people start puberty earlier and some later. Some grow really fast and some grow slowly. And that's exactly why breast sizes can be super different even among friends the same age. There's no "right" size or anything, literally, and it doesn't mean anything is wrong with you or with them.

Your body is just doing its own thing, and it's perfect the way it is. If you're comparing yourself to others, remember that everyone's journey through puberty is unique, and that's what makes us all cool and unique too. Your body is just getting ready for all the amazing stuff it's going to do!