MEN'S SMALL MEDIUM LARGE XL XXL
CHEST (IN) 35-37 38-40 41-43 44-46 47-49
CHEST (CM) 89-94 96-101 104-109 112-117 119-124
WAIST (IN) 29-31 32-34 35-37 38-40 41-43
WAIST (CM) 74-79 81-86 89-94 96-101 104-109
WOMEN'S 8 10 12 14 16
BUST (IN) 35-37 38-40 41-43 44-46 47-49
BUST (CM) 89-94 96-101 104-109 112-117 119-124
WAIST (IN) 29-31 32-34 35-37 38-40 41-43
WAIST (CM) 74-79 81-86 89-94 96-101 104-109
CHEST: Measure around the widest part of your chest.
BUST: Measure around your bust at the fullest point.
WAIST: Measure around natural waistline, the narrowest part above the navel.
SLIM FIT: Hugs your body.
REGULAR FIT: Feels pretty normal.
RELAXED FIT: Made to look slouchy.

If your measurement is in between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.