This shirt is SO awesome. I ordered a medium (I usually wear medium in tees, but smalls in these shirts a lot) and it fits PERFECT! I can fit a casual tee underneath with comfort, the sleeves are long enough, the flannel is not too thick or thin, the synched back is a nice fem. touch, AND if you believe it the color is even better in person (I got NAT). I'm going to buy all the rest! Hurley has outdone themselves on this shirt...! If you're on the fence with this one, I say buy it and try it...you won't regret it!