HUJ C-rings are designed with flatter inner opening, this keeps the ring from rolling so it won’t snag or pinch. 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. Use it around both cock & balls or stack em around the balls. Made from durable AND stretchy silicone blend material.
About 1" diameter (unstretched)