Men's Measurements ALPHA SIZES S M L XL 2XL 3XL 4XL 5XL NECK 13¾-14½ 14¾-15½ 15¾-16½ 16¾-17½ 17¾-18½ 18¾-19½ 19¾-20½ 20¾-21½ CHEST SIZE 32½-36 36½-40 40½-44 44½-48 48½-52 52½-56 56½-60 60½-64 SLEEVE RG 34¼ 35 35½ 36 36¼       SLEEVE LN     37 37½ 38 38½ 39 39½ BACK LENGTH RG Regular Back Length  LN Plus 2 1/2"