For sizing please measure  Around the waist - where the belly button is  Length - from the waist to 3 inchs below the knee 

Size S - Waist 52cm Length 50cm  Size M - Waist 57cm Length 54cm

Size L - Waist 60cm length 58cm Size XL Waist 68cm Length 62cm Size XXL Waist 80cxm Length 69cm