This top down belly button ring is made from 14k gold and cubic zirconia. Our cubic zirconia is bright and clear with an unmatched sparkle, so it will easily convince others it's the real thing. The dangle measures 18.5mm (3/4 in) long and 4mm (3/16 in) wide. Cubic zirconias measure 3mm x 3mm. The ball measures 4mm (3/16 in). The barbell is 1.6mm thick (14g). The gold navel ring weighs 1.5g.