S-- Waist: 70-80 cm / 27.5-31.5 inches
M-- Waist: 80-90 cm / 31.5-35.4 inches
L-- Waist: 90-100 cm / 35.4-39.3 inches
XL -- Waist: 100-110 cm / 39.3-43.3 inches
Standing in a relaxed position, measure your waist at the level of your navel (belly button). I'm not assuming you know your waist size. Do not select by pant size.
