Okay... So... Bra sizes

Sunnysands
DO NOT CRITISISE PLEASE.
Yes I know I'm 14 but I'm curious. At what age do your breasts stop growing and what would be an average bra size for a 14 year old girl?cause I'm a 36A but I'm always wearing medium sports bras and all. As I prefer sports bras but I will occasionally wear a normal bra. Would you say 36A is a good size for my age? Just curious.