Product Details 3mm CZ Star Flat Back Stud Earrings - 1 Pair Check out these super comfortable 20 gauge flat back earrings for 24/7 wear.. No need to take these earrings out; keep them in for sleeping and naps. They're made with 6mm durable 316L surgical grade stainless steel straight posts with a flat disc end. They feature 3mm star shaped cubic zirconia gems for a classic look of celestial style. You'll wonder how you lived without this simply heavenly ear piercing jewelry. Sold as a set of two. Threadless, Push In Flat Back Earrings Specifications 20 Gauge (.8mm), 1/4" (6mm), 316L Surgical Grade Stainless Steel Straight Posts, 3mm Cubic Zirconia, Sold as a Pair