Product Details 3mm 4mm 5mm Synthetic Opal Trio Earring 3 Pack of Flat Back Stud Earrings Super Comfy Flat Backs - Designed for all day wear without poking your neck or squeezing your earlobes Flat Back Screw On Design for 24/7 Poke Free Wear - Comfortable enough for sleeping and naps as well, no need to take them out They work just like traditional earrings, you can insert them from the front Surgical Grade Stainless Steel for even sensitive ears We've crafted these in 20g, the same thickness as traditional earrings, making them perfect for lobe piercings Elegant, stylish, fashionable earrings that will make you shine Water-safe and No Tarnishing - wear in the shower or while swimming Sold in packs of 3 pairs Hypoallergenic Flat Back Earring Specifications 20 Gauge (.8mm), 1/4" (4mm), 316L Surgical Grade Stainless Steel, Synthetic Opal 3mm 4mm and 5mm Tops, Screw Back, Flat Back Earrings, Set of 3 Pairs