When I was around 14. I seemingly went from a B to a D overnight.
I started wearing a bra when I was 11, as did many of my classmates. We had to wear those thin peter pan collared shirts that one wore in Catholic school during the 80s, so you could easily tell who was wearing a bra and who was in an undershirt.
Still waiting. I think I started wearing one daily in 6th grade just for modesty, not really because of actual boobage (our uniform shirts were awkwardly see thru). Even pregnancy didn't bring about a showing of the boob fairy.
6th grade. My dad told me to ask my mom about getting me a training bra. I wore a 30AAA. My mom said I just had fluffy nipples. Ugh, I was so mortified
Training bra or cami's with a shelf bra or liner grades 5 & 6. Sports bras grade 7 By grade 8 I was coming up on a full B cup and had to start wearing underwires (I remember hating them) By grade 10 I was a full C. (This happened when I quit figure skating and my boobs and ass grew suddenly)
I had a D cup in the 6th grade. Fun times. Especially since I was always told I was " too big" & " cover up" by my mom in bathing suits & I wasn't allowed tank tops until I worked & made my own money.
My Mom LOVES to shame the female body. She still talks about it today. Her favorite garment is a turtle neck.
I got a training bra in 6th but they didn't come in until 7th. It happened very quickly. A to D in a few months. I know because I was given a basketball uniform at the beginning of the season that fit my (flat) chest and by the end of the season it was obscenely tight and borderline inappropriate looking. It was one of those tight polyester ones with collars that girls wore in the 70s and early 80s.
Still waiting. Actually, I was the first of my friends to get "buds" & need a bra. It was either the summer after 5th grade or 6th grade. They just never grew after that.
Young. And they came in over the summer. I remember looking in the mirror and crying because I felt like a freak. My sister was all "OMG, do not cry because you have huge boobs! I want huge boobs!" lol. They just looked weird and foreign on me. I think I was about 13-14 or so. I mean, they grew into a DD in what felt like overnight.