This all depends on the individual girl. Some girls will have already developed breasts by the time they are 13, and other may not have even started. This is regulated by when / how long you have been going through puberty for. Generally, most girls who are 13 are around a A- to a B-Cup. Mind you, some can be as large as a D-, while other might be smaller than a AA-Cup. There is really no "normal" standard for this.
34/36 b but everyone develops at their own rate
there is no actual size. depends on your hormonal growth development.
that's huge
The size of your breasts is predisposed in your genes.
That depends on heredity. Look at you mom and your grandma on you moms side. Your boobs will be in the general area of their sizes.
Size varies greatly and depends on whether or not you have achieved puberty.
it SHOULD be about 5 inches. I AM 13 and mine is 6.5inches
Enlargement of the breasts is one of the signs of puberty. It sounds like Misty May and Dawn have started puberty a little early.
We can grow big breasts by doing sex with other boys because they suck our breasts.
BIG
yes
IT IS VERY NATURAL!!!you should not get boobs at that age i did not get mine til i was 13! so stop worrying!!