Comes with a replacement button, lining and material are both 100% polyester Small measurements: armpit to armpit 17.5 inches, length (from middle of scoopneck to bottom of shorts) is 26 inches, waist 12.5 inches Medium: armpit 18 inches, length 27 inches, waist 12.75 inches Large: armpit 18.5 inches, length 28 inches, waist 13 inches All measurements are taken lying flat on the floor. Waist was measured fully cinched so can be stretched to be bigger.