HUJ c-ring is our take on a basic ring most guys will want to use and use often. Our history shows this size ring gets used multiple ways, often more than one at a time. HUJ ring is a c-ring or a ball ring, some guy's stack them for more stretch or for more grip. HUJ c-ring has a groove inside the ring that flattens out when worn, this keeps the ring in place and keeps a bit of lube between the ring and the wearer for comfort. Our plus + silicone blend Thermoplastic Rubber TPR, silicone. Silicone for a smooth and warm feel, TPR for amazing stretch and strength. Phthalate free. Dimensions: Width: 2 in. Height: 2 in. Depth: .75 in. Outer Circumference: 6 in. Inner Circumference: 3 in.