These four-color linear hoop earrings measure 2.3/4" x 1.0" at their widest point. Materials: 14k gold and rose gold-fill (14k gold over brass core/no nickel), sterling silver (.925) and oxidized sterling silver on gold ear wires. 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.