Adult Unisex Sizes:

S = 38" Chest/Body Width, 27.5" Length
M = 42" Chest/Body Width, 29" Length
L = 46" Chest/Body Width, 30" Length
XL = 50" Chest/Body Width, 31" Length
XXL = 54" Chest/Body Width, 32" Length
XXXL = 58" Chest/Body Width, 33" Length