Overall, I love this swim shirt! I love that it zips up, so if I’m hot, I can unzip it a bit, and the navy under the arms is very flattering. I usually wear a Small in T-shirts, but I didn’t want this to be super tight on me because of the material. I read the reviews, and sized up to a Large. The Medium would have worked, I just would have felt like you could see a little too many curves. A small would have been very very snug. It gave me good protection in the sun, and I wasn’t hot in it, I waSee full review