I had no idea how I would find swimwear that fitted my postpartum / breastfeeding body - I'm currently a 14 GG-H cup and self conscious of my 2 months post c section belly. I bought the XL. They fit well and I don't think the girls are likely to pop out in the water. Not super supportive given my size but much more support than I was expecting. I haven't been swimming in them yet but I'm looking forward to it.