This pendant piece on this tri-toned multi triangle necklace measures 1.0″ x 3/4″ at its widest point. The chain length is adjustable and can be worn at 16.5″ to 17.1/2″ in length. Materials: 14k gold-fill (14k gold over brass core/no nickel), sterling silver (.925) and oxidized silver. All materials are hypoallergenic. The black (oxidized) components of our jewelry will wear over time and eventually achieve a beautiful antique-like finish. This necklace is designed in San Francisco and handmade in our Upstate New York production studio.