Size (US) Chest Neck Waist Arm Length
XS 19" 6.5" 19" 6.5"
S 19.5" 7" 19.5" 7"
M 20" 7.5" 20" 7.5"
L 20.5" 8" 20.5" 8"
XL 21" 8.5" 21" 8.5"