CHEST measure under your Arms, measure Only the most columous part of your bust, from one lateral point of your body to the other. WAIST measure the full circumference at the narrowest point of the wais. HIP measure the full circumference at the widest/fullest point of the hips. LEG SIZE measure the length from the waist to ankle. ARM SIZE measure the length from shoulder to fist. SPECIAL HINT another way to know if the piece selected will fit: compare similar products from your closet and then compare measurements. This way its possible to have a good ideia of your size.HIP measure the full circum ference at the widest/fullest point of the hips. LEG SIZE measure the length from waist to ankle. ARM SIZE measure the length from shoulder to fist. SPECIAL HINT another way to know if the piece selected will fit: compare similar products from your closet and then compare measurements. This way its possible to have a good idea of your size.