Estate earrings stamped Tiffany & Co. 750. These shell motif earrings measure 16mm x 16mm and clip on the ear with an omega backing. These earrings have a post for pierced ears that has been lowered down into the earring so they can be worn as a clip on or a pierced earring. If worn as a pierced earring you may need a jeweler to customize the post for you. The omega back creates a snug fit that holds the earring up straight on the ear lobe. The earrings come in the pictured box. All weights and measurements are estimated.