This captivating IP Gold Captive Ring with White Opalite Bead is 16G with an inner diameter of 5/16" (8mm). Crafted from Gold PVD 316L stainless steel, and featuring a 3mm synthetic white opalite bead, it's perfect for septum, cartilage or nipple piercings. Sold individually, buy two to create a pair. For healed piercings.