these are dance pants, or undies you wear under a dance dress/skirt. costume Halloween dance gymnastics skate measurements waist band is from seam to seam across. length is from back of the waist band to the bottom seam (the bum) small waist 25 length 31 cm medium waist 25 cm length 30cm Large waist 30 length 35 cm XL waist 33 cm length 36 cm