These classic earrings are 18 x 24 mm and 12 mm high in an classic style with Swarovski crystals surrounding a high dome acrylic jet black or white pearl oval stone. They are held on each ear with two enamel painted ceramic magnets which makes them super comfortable! These beautiful pearl earrings in a classic button style will complement any outfit you wear. They can be ordered with a very light 14 karat gold plate or nickel plate. The magnetic style is held on the ear with two enamel painted 13 mm ceramic magnets; one is attached to the earring and one goes behind your ear to hold it on. Treat these gently, just as you would real pearls and keep them free from make up or chemicals that might damage the finish. AVAILABLE IN PIERCED UPON SPECIAL REQUEST in your order. They will have surgical steel posts and large backs. 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.