I'm a girl, btw. I exercise regularly, but still they keep growing. I'd rather have a small chest. Almost every other female is my family is pretty small too. (A - B) I'm pretty sure I'm almost a C now. I'm only 5'2", so would a big chest look weird? Is there any way to make them stop growing? Or will it only stop after puberty?
As someone has mentioned go get some good bras, I mean not pretty bras, but ones that do their job. And don't go wearing sports bras all the time, they aren't good for the girls..
Why would it? Some women have big breasts, others don't. Why bother? The only reason to bother about it would be if the weight is hurting your back... but that won't happen with just a C. And if it really bothers you... go see a doctor. Maybe they could advice you on what to do