Product Details18 Gauge Threadless Reversible Heart Gem Trio Medical Grade Titanium Flat Back EarringProduct Details Super Comfy Flat Backs - Designed for all day wear without poking your neck or squeezing your earlobes Threadless Flat Back -Provides a secure fit for all day wear including sleeping and naps; no need to take them out Heart Shape Back - A charming change from the standard disc shape providing an Easier Grip for insertion and removal Medical Implant Grade Titanium - Hypoallergenic earrings; perfect for even sensitive ears Reversible Flat Back - This flat back earring can be worn both ways; reversed for twice the style Elegant, stylish, fashionable earrings that will make you shine Hypoallergenic Flat Back Earring Specifications 18 Gauge (1mm), 1/4" (6mm), 14k Yellow Gold Plated over ASTM F-136 Titanium Straight Post, Reversible, Threadless Design