-♫ HIGH QUALITY MATERIAL：We use safety and eco-friendly materials, strictly control in quality unsure the earrings do not easily to rust . AAA+ sparkling cubic zirconia inlaid. It’s not only strong and Hypoallergenic but virtually maintenance free, they only need wiping for sanitary. -♫ DIMENSION: The size of the earrings: 15mm(0.59 inch)×15mm(0.59inch). 925 sterling silver nut backs is easy to adjust , put on and take off , suitable for Men and Women. -