I'm 5-10, 170 lbs, 40" chest & generally opt for slim fit shirt cut. Originally ordered size M, shoulder seams landed about half-way down my biceps, sleeve length hit at my elbow, shirt looked too baggy all around.Returned for size S & fit is very good. Shoulder seams still fall inch or two down my upper arm but you'll notice in product pics that's how it's designed. That causes the shirt sleeves to stick out more than usual but not enough to be bothersome. It came with a stiff crease down the sleeve that should soften after washing.Quality, light-weight material, consistent stitching, collar has option to button down or leave open, subtle logo on front chest & centered on back doesn't stand out, polishing cloth inside front shirt tail is nice touch. Overall great value with form & function.