These tri-toned circle post earrings measure 1/2″ long by 1/2″ at their widest point. Materials: 14k gold or rose 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. These earrings are designed in San Francisco and handmade in Upstate New York.