SIZE WAIST (CM) WAIST (IN)
XS 66 - 73.5 26 - 29
S 73.5 - 78.5 29 - 31
M 78.5 - 84 31 - 33
L 84 - 90 33 - 35
XL 90 - 94.5 35 - 37
XL 94.5 - 99.5 37 - 39

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.