I originally ordered two of the Elli Bralettes in medium as I was desperate to find a comfortable bralette that I would reach for day after day. I normally purchase size 34A in bras. After reviewing the information on the NDA website, I thought the size medium would be a perfect fit. After trying the Elli on in a medium, I ordered a size large, worried that the medium was too tight. In the end I kept the size mediums and returned the size large. In the process of determining my size, and reordering, returning, etc. the Customer Service could not have been better. They were helpful, shipping was fast and they understood completely when I couldn’t return the bralette immediately. I just ordered two more Elli Bralettes in size medium. The bralettes are very, very comfortable, so comfortable that I forget I’m wearing a bra. They appear very small initially, not tight at all, just small. Surprisingly, they gently conform to your body. I, personally, would prefer a bit more padding in the cups, but love these bralettes for their comfort and ease.