These magnetic non pierced earrings are genuine Swarovski crystal in a white diamond look, set in a square setting and held on with two magnets. There is a neodymium magnet in front and an 8 x 3 mm enamel painted ceramic magnet in back so you don’t need pierced ears.. These are non piercing and non pinching and they may be the most comfortable little earrings you will ever find. Wear it in the usual spot on your ear or higher up for a contemporary look. So much more comfortable that the old clip on type earrings, and it looks like it’s really pierced. Sold in pairs. Need extra or stronger magnet backs? They are listed here: https://laurawilsongal.com/products/extra-magnetic-earring-and-eyeglass-holder-backs If you have misplaced your metric ruler, remember that 13 mm=1/2 inch. Remember: The wider the magnets, the more comfortable the earring is. If you are allergic to nickel, order only earrings that have both enamel painted ceramic magnets front and back since the neodymium magnets are plated with nickel.