These handcuffs are crafted from durable, flexible, and lightweight silicone. The material's stretchiness ensures a smooth and pleasant fit, making them easy to put on and take off. Stretch them beforehand for the most comfortable fit. They are made from high-quality, body-safe silicone, these handcuffs are soft, stretchable, and waterproof, delivering a secure yet comfortable experience. These wont pinch your skin! The cuffs have an inner diameter of 2 inches, an outer diameter of 2.5 inches, and a total length of 7.25 inches.