Sizes: 53", 55", 57", 59" Specify size by back length. Small Long - 5'6" - 5'7" Height, 53" Back, 33 Sleeve Length Medium Short - 5'8" - 5'9" Height, 55" Back, 33 Sleeve Length Medium Long - 5'10" - 5'11" Height, 57" Back, 34 Sleeve Length Large Short - 6' - 6'2" Height, 59" Back, 34 Sleeve Length