Hmmmm....odd question lol?

my daughter is 12 (as of june) she has started her period this month, so that will make a difference.. as your body matures, you will have larger height, weight bra size, ect... before puberty you will have smaller sizes.. so part of your question should include wether you have started puberty.. anyway.. my daughter started developing at age 11 and now at 12 has her period. she is 5 foot tall, 100 pounds and a size 34 B bra. (she has big , but so did i!) its really about genetics, so best thing to do is ask your grandma and your ma about when they were your age.. that will be your best bet :) good luck!