Youth Sizes:

XS - 2/4 = 29"; Chest/Body Width, 20"; Length
S - 6/8 = 31" Chest/Body Width, 20.5" Length
M - 10/12 = 33" Chest/Body Width, 23" Length
L - 14/16 = 36" Chest/Body Width, 25" Length

Adult Unisex Sizes:

S = 36" Chest/Body Width, 28" Length
M = 40" Chest/Body Width, 29" Length
L = 44" Chest/Body Width, 30" Length
XL = 48" Chest/Body Width, 31" Length
XXL = 52" Chest/Body Width, 31.5" Length
XXXL = 56" Chest/Body Width, 32" Length
XXXXL = 60" Chest/Body Width, 33" Length
XXXXXL = 64" Chest/Body Width, 34" Length