The pendant piece on this black and gold interlocking necklace measures 1/2” x 3/4” at its widest point. The chain is adjustable and can be worn at 17.1/2″ to 19.0″ in length. Materials: 14k gold or rose gold-fill (14k gold over brass core/no nickel) and oxidized sterling silver (.925). 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 was designed in San Francisco and is handmade in our Upstate New York production studio.