Groove's Original Solid Colored ring is the ring that started it all. The highly popular Pearl color lets you and your ring stand out among the crowd. Our high-tech grooves provide an unmatched level of breathability and comfort. Engineered to keep air in and moisture out, you can't go wrong with this ring. The medical grade silicone keeps your ring flexible while maintaining a durability that other silicone rings can't compete with. This ring is the perfect choice to replace your old metal ring. Perfect Design with unique medical-grade materials for undeniable quality beyond any silicone ring that came before. In a class of its own. Width: 8mm or 5/16" Thickness: 2mm or 3/32"