SIZE CHEST (CM) CHEST (IN)
XS 84 - 89 33 - 35
S 89 - 94 35 - 37
M 94 - 99 37 - 39
L 99 - 104 39 - 41
XL 104 - 109 41 - 43
XL 109 - 114 43 - 45

CHEST: measure underneath the armpits with the tape measure straight around.
WAIST: natural waist measurement is taken from above the hips, close to the navel.