Tibetan Style Linking Rings, Lead Free and Nickel Free, Antique Bronze Color. Size: about 22mm in diameter, 1.5mm thick, 18.5mm inner diameter. Linking Ring gives you the option of connecting the settings together with jumprings or a chain to make interesting and unique jewelry combinations. And buy this 500 pcs Tibetan Style Linking Rings For $10.19 @PandaHall