16 mm Chatoyant Purple Glass Magnetic Non Pierced Clip Earrings
I was only able to get the two of these purple glass cabochons. They are similar to a cat's eye and 15 x 10 mm high.
Two 13 x 2.5 mm (1/2 inch) enamel painted ceramic magnets hold them on your ear comfortably with no pinching.
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.