I was sleeping round my friends house and I forgot my bra and pants so I popped down new look to get a new set. The problem is they didn't have an a cup only a b cup so it's a little loose how can I improve that?
Cross the shoulder straps in a racer-back style like what these guys said, and get one that is a sister size. Example: a 30B cup will fit a 32A, 30C and 32B will fit a 34A. Just remember to wear a smaller band size. Hope this helps :)