15, and my boobs are different sizes. Will the smaller one catch up?

Maybe, Maybe not. I've never met a woman with exactly the same size breasts... unless they are fake of course.

That's the same for me. My dr checked to see if there was a muscle because if there is it'll probably catch up... but I heard if it doest grow or if there is no muscle then insurance will cover an implant for the one boob, but I could be mistaken

I have this problem, I always have and I am 22 years old now. My right boob is about an a MAYBE a small b... my left is a large be maybe a small c. This was VERY hard for me when I was in middle school and high school.. I would "stuff" to look "normal." Now I just even them out and I am fine. My husband loves me no matter what! When I had my daughter is when it didn't matter anymore. I just hope she doesn't have this problem, but if she does I will understand. Good Luck