These large black and gold rounded square post earrings measure 1.0″ by 1.0″ at their widest point. Materials: 14k 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. These earrings were designed in San Francisco and are handmade in our Upstate New York production studio.