Features: Calf yoga rings designed according to the human body curves, used for massage to relax muscles and to help strengthen the fascias, improve postures, and strengthen the core. Yoga rings for calves can used to tighten thighs, do legs lift to straighten core. Yoga rings is Light weight and Portable, can not occupy much space. You can put into your bag, hide in closet or hangs it anywheres. Whether work in office or at home, yoga rings for leg calves helps in strengthening upper your muscles. Yoga rings for leg is also the perfect addition to any commercial gym, yoga studios, or aerobic classes. Specifications: Materials: Plastic Styles: Soft Styles/Massage Styles Color: Blue/Pink Size: about 23x12cm/9.06x4.72inch Package Includes: 1pair Pilates Circle Rings note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.