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 Ring Concierge, Diamond Huggies, Stud Style, Personalized Pendant, Earrings Collection, Bezel Setting, Eternity Bands, Personal Marketing, Jewelry Pieces