Product Description Material: alloy Large ring size: approx. 23mm/0.91 inches Small ring size: approx. 17mm/0.67 inches Total ring size (L x H): approx. 8x3cm/3.15x1.18 inches Made of alloy with high strength and hardness and will not fade, requires low maintenance, high smooth inner face, comfortable wear. NOTE 1.Please allow slight deviation for the measurement. 2.Due to the light and screen difference, the item's color may be slightly different from the pictures,thanks for understanding.