I like this shirt for sun protection while I am biking in the Nevada sun. I have a few thoughts on the sizing. I ordered a large because I don't like tight fitting work-out clothes. I am 5'4", 140 pounds with a c/d bra size. The body fits fine, but the dolman sleeves are a little tight under the armpits. You have to wriggle around to get them just right, and I have to roll up the sleeves about two inches. Those are my only complaints. I don't mind the longer sleeves, but the shirt would be more comfortable if it was a little looser under the arms. Outside in the sun, it works fine. It doesn't become too hot while bike riding and at 70 degrees, it's nice and cooling.