Bests & Worsts Reviews from Amazon

This is a rashguard, and it fits like a rashguard is supposed to. If they sized them like shirts, no surfer would wear one because it would be horrible when used for its original purpose. The reason so many people are having size problems is that rashguards were originally made to wear under a wetsuit. They were to prevent rubbing and chafing, which can be a problem with long days of surfing, and they also help improve the warmth to some extent. They need to be very tight, as no one wants to be paddling out and have a loose shirt moving around and creeping up to your armpits, under your wetsuit. The sizings are correct if you use them under a wetsuit. I wear a medium shirt and can wear a medium rashguard just fine, but if you're buying this for a sunshirt or a beach shirt, even if you're playing around in the water, do what everyone suggests and buy one that's a lot larger. If you want it for surfing (even if you're in tropical water and are just using it as a sun protection top) buy the size it lists, or you're likely to find it won't stay down in place, even if you use the loop to fasten it to your trunks.