It depends. Mine were 34d, I was just lucky. (: Everyone matures differently. Some don't go through puberty until 16 or 17. Don't worry about it.
Depends on how fast you develop I myself was a quick developer and was around a 30A don't feel as if you need to be fully grown at 12 you won't be.
12-14
Not at all :)
Age 12-15
It really depends on your growth rate. I'm 12 and I have small boobs perking up. Everyone grows at a different rate!
I'm pretty sure that breasts don't shrink unless you have a reduction surgery, so if you're talking about yourself you should be fine.
Ages 12 to 15 sometimes at ages from 16 to 18
It depends give them time
They will probably never be c. I am 12 and am a 34a. Everyone is different. Your size doesn't matter.
No! Sex should not be a thought at the age of 12...
No
At age 12 you should be hooking up your X-box to your television.
you should be at least 12 years old.