Blue Agate Glass 13 mm Button Magnetic Clip Non Pierced Earrings

Beautiful and classy, these look like real blue striped agate but they are glass.
Unlike a standard clip, the magnetic style is held on not by pressure, but by a magnetic field. Each earring is held on the ear with two magnets; an 8 mm nickel plated neodymium attached to the earring and a 13 x 2 enamel painted ceramic that goes behind your ear.

Need extra or stronger magnet backs? They are listed here:  

https://laurawilsongal.com/products/extra-magnetic-earring-and-eyeglass-holder-backs

Remember: The wider the magnets, the more comfortable the earring is.

If you have misplaced your metric ruler, remember that 13 mm=1/2 inch.
If you are allergic to nickel, order only earrings that have both enamel painted ceramic magnets front and back since the neodymium magnets are nickel plated.