Silver Square Button Magnetic Earrings
These are held on the ear with two magnets. The squares have a neodymium magnet attached and use an 8 x 3 mm enamel painted ceramic magnet back.
The 10 mm square was plated without nickel and has a rough finish because of that but the neodymium magnet does have nickel.
They are sold in pairs and handmade in the USA by Laura Wilson
Need extra or stronger magnet backs? They are listed here:
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.