Main Stone: Cubic zirconia Material: Copper Size Details: US Size 6(Dia.): 16.4mm/0.65" (Approx.) US Size 7(Dia.): 17.3mm/0.68" (Approx.) US Size 8(Dia.): 18.1mm/0.71" (Approx.) US Size 9(Dia.): 18.9mm/0.74" (Approx.) US Size 10(Dia.): 19.7mm/0.78" (Approx.) Weight: 5g JEWELRY MAINTENANCE: * If allergy exists,stop wearing.This is a fashion jewelry, not real pure gold/silver * Keep this product out of reach of small children. * Reduce to touch sweat. * Take off the jewelry while bathing,washing. * Avoid the mixing with other jewelry or hard things. * Often clean it. * For example more sweat or bathing ....etc., will affect the color change. This is a lovely gift for your families, daughter, granddaughter, wife, mother, girlfriend, friends, lover. It's also a wonderful gift for Anniversary, Birthday, Mother's Day, Valentine's Day, Thanksgiving and Christmas.