People develop at different times and different speeds. As such, there is no 'normal' size for any stage of development. The 'normal' size is simply the size you are.
Typically younger women take time to fully develop so an A or B cup would be most common, but some may be larger and some may not even need to wear a bra. Size varies significantly with genetics, so you will likely develop at a similar rate to those who you are related to. Talk to your mother, aunts, sisters, or cousins about their experience.
34c
i dont no it depends
There is no average size. All titties are different
34
A
No
To make them look hot for boys. Well girls want a bigger size breast so Boys get to like them.
the average breast size is a C cup but if your smaller don't worry about it
Im 15 now but when i was 13 i was 34B , but all girls are different so there isn't a real average (:
34B
AAA
The average American bra size is 34 B.