Discover your perfect size with this cock ring set from the Sinner Gear collection. The set consists of 3 metal penis rings that can be worn around the penis, the balls and the glans. The rings are strong and heavier that most cock rings and because they are made of metal, they can be used with any type of lubricant. Dimensions rings: Small: inner diameter 3.5 cm, outer diameter 5 cm; Medium: inner diameter 4 cm, outer diameter 5.5 cm; Large: inner diameter 5 cm, outer diameter 6 cm.