Metal Material: Silver 925 (92.5% pure silver, essentially treated as pure silver), and 5A Zirconia (which has a diamond-like brilliance and a hardness comparable to corundum). It is completely free of nickel and lead, which are common allergens, making it gentle on the body and minimizing the risk of allergic reactions. Free Size, Adjustable: Ladies: Adjustable from size 10 to 20; Men's: Adjustable from size 13 to 24. Weight per pair: Approximately 3.5g. Each piece is carefully crafted by skilled artisans. We deliver reliable quality with attention to detail.