14k hollow gold Outer diameter: Small: 20 mm, 0.79 inches Medium: 30 mm, 1.18 inches Large: 40 mm, 1.57 inches Width: 5 mm Friction back closure Sold as a pair Modern Yellow Gold Oval Jewelry, Modern Oval Yellow Gold Jewelry, Modern Hallmarked Jewelry For Everyday Luxury, Matte Gold Round Jewelry For Formal Occasions, Modern 14k Gold Jewelry With Shiny Finish, Matte Gold Luxury Jewelry For Everyday, Modern Rounded Jewelry For Anniversary, Minimalist Round Jewelry With Polished Edges, Round Minimalist Jewelry With Polished Edges