This is an approximate conversion table to help you find your size. Measure around the fullest part, place the tape close under the arms and make sure the tape is flat across the back (Unit: centimeter).
Measure at the fullest part of your chest, keeping the tape parallel to the floor.
Measure at the smallest part of your waist. This is usually below the rib cage and above the hip bone.
Measure at the fullest part of your seat, keeping the tape parallel to the floor.