This cannpt be determined since your body is still going through hormone changes and will be for the next few years. Some girls develope early while others are called "late bloomers". When I was a freshman in high school I got picked on for being flat chested. I was a "Late Bloomer". Each year after that I went up a cup size. Now I'm a DD. So don't worry about boys think because your bra size shouldn't matter at your age.
32-36a
34B
34A
average would be 32B
There is no average since each girl/woman is different and breast size is based on DNA.
i think an average 13 year old would be a 34 B, but everyone develops differently.
32A or 34A would be average bra size for a 12 year old girl.
no but it is not small it is the average '
34 b is the average bra size in the us 36 is the best looking size
34 b is the average bra size in the us 36 is the best looking size
Whatever size she is, is the perfect size for her.
34 CC to a 36 DD
There is no ideal bra size for a 12 year old. Your bra size will change a lot over the next 8 years, and probably over your entire life.