These are great earring backs - the disk spreads the pressue of the earring clutch out behind the ear, and make large earrings more comfortable. Because they are larger, they are easier to find when dropped too! 12 mm across the disk. Serious earring collector pack - 100 pcs, or 50 pairs. Metal part contains nickel.

Bulk Pack. 12mm x 6mm By the pack of 100 pcs.