This elegant captive ring is crafted from solid 14k white gold and set with a beautiful synthetic opalite ball. Sold individually, they come available in three sizes, 20G, 18G, and 16G, and can be easily trimmed to fit with the annealed design. The ball is fixed, with 20G featuring a 2mm ball and 18G and 16G featuring a 3mm ball, and an inner diameter of 5/16??(8mm).