M L XL XXL XXXL 29-32 29-34 30-32 30-34 30-36 31-32 31-36 32-32 32-34 32-36 33-32 33-34 33-36 34-32 34-34 34-36 36-32 36-34 36-36 38-32 38-34 38-36 40-32 40-34 31-34 40-36