What is the average breast size for a 13 year old girl?

Average size is any where from 36a to 34c

ok well im 10 and im like a 36a so yea....and i havent had my period yet...so yea,and my friend shes 11 abd wears what a 32b

I'm a 34B and I'm 13, but he average is probably an A/B cup