I love this shirt. I had originally ordered my typical size medium as I'm 5'11" and 178 lbs and occasionally creep into a size large, but the medium was HUGE and was returned for a size small. The small fits perfect. The sleeve length covers my wrists when my arms are fully extended. My only complaint and the only reason I'm not giving it 5 stars is the huge writing on the sleeve. I don't like logos or writing period, but good quality and hooded UPF shirts are hard to come by. I will definitely be buying more in different colors.