Adorable and elegant, silver drops set with crystals in a silver setting and held on your ear with 2 magnets, a 5 mm nickel plated front and a 8 mm painted ceramic magnet. There is only one pair and it is 51 mm total length. These are sold as a pair. They are one of a kind. 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. Made in USA.