Surgical Steel 4mm Ear piercing Earrings studs 12 pair Mixed Colors White Metal by Caflon 12 Pair Mixed 4MM Colored Glass Foil Back Stones in a Birth Month Set Each stone is set in sterilized surgical steel All earrings exceed all F.D.A / E.C requirements. Earrings are sealed and sterilized in individual packages. Comes with Butterfly Earrings backs, are grooved friction post for secure fastening. Sold per Dozen (You get 1 pair of each Month)