This Gold PVD CZ Flat Disk Captive Ring is crafted with Gold PVD on 316L stainless steel and is available in sizes 16G - 2G. The 12G, 10G rings feature a 4mm CZ, 8G has a 5mm CZ, 6G has a 6mm CZ, 4G has a 7mm CZ, and 2G has a 8mm CZ. Openers are recommended for 8G and larger sizes. Perfect for healed piercings!