Shimmertails are made of high quality spandex and polyester so they will stretch to fit most body types. The size chart can be best seen at our website Shimmertail.com/size-chart. Measurements: 5/6 Small, Waist 20-24 inches, length 28 in. 7/8 Medium, Waist is 20-24.5 inches, length 30 inches. 9/10 Large Waist 21-25 in. length 32 in. 11/12 Tween Waist …