This tri-toned arc necklace is adjustable, and can be worn at 18.0″ or 19.1/2″. The pendant piece is 2.0″ by 1/8″. Materials: 14k gold-fill or rose gold-fill (14k rose gold over brass core/no nickel), sterling silver (.925), and oxidized sterling 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 was designed in San Francisco and is handmade in our Upstate New York production studio.