Verified Buyer Reviewed by SB from Phoenix on Wednesday, June 21, 2017
I ordered this in a M and I'm 5'3", 115 lbs. I usually wear a S, or in some stores an XS. It is, as advertised, snug fitting. The neck opening covers my whole chest, which is nice. I wear it stand-up paddleboarding and it works well for that. The fabric bunches a bit in the armpits, but it isn't constricting or anything - it's not noticeable unless you look. Overall, a really good buy on a rash guard.