First off, I'm of average height and slight build. I've worn the Vertx coldblack short sleeved polos in a size small and must say, they're my go to shirt. A long sleeve is a gamble, though. Will the arms be too short? What about the cuffs? Needless to say, I was not disappointed. If you have large forearms, you may have difficulty pulling up the sleeves, but when stretched, they give nicely. I have no doubts they'll hold their shape for a long while. Otherwise, everything is as perfect as the short-sleeved version.