The sizing is interesting I ordered a Large and when I measured my under-bust I measure at about 34-35 inches around. I ordered this bra in both black/grey and white. Great for when I wear tank tops in the summer at the beach! I would definitely recommend these. Their very comfortable and a cross between a sports bra (which I only wear) and a bra (which I hardly ever wear). Im very tomboyish that way. Anyway these are my new favorite. The sizing I would say is off. So I purchased one in large first. When it fit great I ordered another. If I went off the chart it would have fit way too small. Im glad I went up in sizing.