The COS jewelry designers present a modern take on the classic signet ring. This piece is crafted from silver-plated recycled brass that's subtly tarnished for a nuanced look and has a sculptural shape that's curved on one side and squared off on the other. Brass is a versatile material that can be recycled numerous times without losing any of its properties Shell: 100% Recycled brass. Plating: 100% Silver. Excluding trims Inner width of size XS/S is 0.71”, M is 0.75”, L is 0.79”