11-13. I always knew about them just never really believed I'd need them one day. I just didn't think I'd ever grow up. The day came and I just sort of told my mom it was time and I needed some. So we went out and got some. I started with cami's (tank top with a lining / elastic thing in it) and moved up from there fairly quickly.
I knew about bras since I was a wittle baby. My mom is always walking around the house half naked, so as soon as I could talk I probably asked her about it and she told me. I remember asking her when I would get one too, and she just said when your boobs get bigger. haha pretty open childhood in my opinion
I was 10. I remember developing early and my mom explained things to me. She asked if I wanted to try wearing one of those small training bra type of things, so I did. I felt more comfortable, since no one else was developed yet and I felt self conscious.
I guess I always knew that they existed. I started actually wearing one at 9. The first one was just for coverage. I grew slow until I was 11 when I started to feel them bounce and get annoying so I got measured as a 34B, by 12 I hit 34D then I got a 34DD at some point and wore it way longer than I should! After years of squeezing into it I got measured at 16 for a 32F now I wear a 32G.