This ankle sock is made of 100% high-quality polyester, bottom designed with anti-slip silicone grips. Non Slip Sticky Grips Socks for Pilates, Ballet, Yoga, Barefoot Workout or play on trampoline or floor. Different sizes and colors are available. Suitable for home, hospital, gym, studio and so on. 7 7/8" L x 3 5/32" H