There is no specific time or age. Developing breasts is a part of puberty.
People develop at different speeds and ages. Some girls develop earlier, some later than most. It is perfectly normal.
It really depends on your body. Some girls start getting breasts at 11 and others not until almost 16.
Some girls get breasts at 10!! How crazy's that!!
nothing that pretty big for a 12 year old nice
Yes if they are grown naturally but it is not common.
No. They're larger than the usual bra size.
Age 12-15
Are you sure about this because a 13 year olds breasts would look like a womans breasts
Your body controls the hormones that grow breasts.
If you show him your breasts he might be scarred for life.
There are some females fully grown with same size or even bigger.
It means you've eaten too much and should get a nice sexy laced bra :)
2
with your hands
There is no average size. My niece was a full C cup at 12 yo, while I was still flat. I was 14 before I was a B cup.