Fully adjustable, one size fits most. Stainless steel, nickel free, lead feee, hypoallergenic. Delicate but durable. To clean, wipe with a soft cloth. Avoid frequent contact with strong chemicals, such as detergent, bleach, perfume, etc. Store in a jewelry box or soft cloth. Always remember to remove your gold bands before shower or exercise. Do not wear them in hot tubs or swimming pools.