I did lots of research and was looking for something that would stay up and be cute to show under those low cut tops for summer. This little bandeau was more than I was expecting to spend but you get what you pay for. It is very comfortable and does stay up. I'm a 155# 36B and ordered the medium. It did fit but it was a bit tight giving me that slight bulge by my armpits. I'm going to try a large and see if this corrects the fit - it definitely doesn't slip or move but it will cut in a bit to give that uniboob look. I would suggest sizing up one if you normally wear a med/large and are on the fence.