I use this rashguard while surfing.  It does fit tight so I went up one size.  When you are in the water it feels right.

I was concerned about size, since there are divergent opinions. I wear a size 10 swimsuit, and ordered a large, just in case it ran small. This size fits me well, it is snug, as it should be, but the neck fits well (I've had others that I couldn't get over my head) and doesn't feel too much like a turtleneck. Somehow, all rashguards seem to be made for gorilla arms. They run very long, but just folding them back into a cuff worked very well. I teach water aerobics, and my hot pink shirt makes me easy to find. I will order this brand again.

Comfortable, dries fast, perfect, love it!

I ordered a size bigger and it fits well. It's just a tad bit looser than skin tight so that every detail of my swimsuit and body is not imprinted on the shirt. It's not hot either and is comfortable.

Consider ordering a size up, very nice in quality but runs too small.
Will have to exchange or return it

Love it.  Very fitted though, I usually wear a medium but glad I ordered the large!  Great pink!