u/Emotional-Ad1423

I recently got help sizing for a bra, all of mine were way too small (36c) and they told me i should get a 40D. I agree that i’m definitely a D cup since C and CC doesn’t cover nearly enough boob. However, with the new D cup bras the cup is hurting my armpit. I’m confused and wondering if the sizing is wrong or if maybe I just need a different kind of bra with a lower cut design. Please give advice, bra recommendations would be amazing, and please be nice because I do not like having big boobs. Thanks!