As mentioned, certain factors will determine the average size of 12year old breasts, so the bra size may change a bit as well. Here is what other young girls have to say about their growth pattern. "While I was in my JUNIOR year, I wore an A size bra. I was 15 at that time. It all changed over the summer and I had to wear a. PRETTY Anola Browne has breasts that men adore – but they are so big they are ruining her life. The year-old — whose all-natural 34LL chest has not stopped growing since she was 13 — is so self-conscious she even refuses to be seen naked by partners. She said: “Men love my boobs. Getting a man.
Heredity (the way certain features are passed down from generation to generation), nutrition, weight, exercise, and chronic illness determine when you are going to begin puberty and develop breasts. Most girls' breasts begin growing when they are about 9 or 10 years old, but some girls may start developing breasts earlier. I've had boobs since I was 8. At recess, I looked like the lone woman in a sea of dainty little girls. From afar, people probably thought I was a student teacher or something. Not only did my boobs come in young, they came in big, too. My breasts were ragweed in your backyard, they just wouldn't stop growing.