12MM Simulated Onyx Black Diamond Simulated Crystal Glass Round Stud Earrings, Hypoallergenic Posts Use claim code ZIVADEAL at checkout and get 20% off when you buy 4 or more items sold by Ziva Jewelry; 15% off for 3 items and 10% for 2 items 12 MM is about 0.5" Inch-earring could fit snugly into a hollow 0.70" Inch dime Multiple facets provides maximum light reflection, i.e. sparkle (facets are flat sides of the stone that result from being "cut") Lightweight & comfortable, Hypoallergenic Lead & Nickel-Free alloy metal