Quantity: 1 Pair This is a Fine quality Tiny Studs Earrings are Good for Small Earlobe or Second and Third Ear Piercings. Earring face : 4*3 mm(conversion : 1 inch = 25.4mm or 1mm = 0.0393 inch)( Post Length 12mm / 7/16" One Size Fits All ) The back of this ear stud is Push Back with 925 Sterling Silver Post and Back Lightweight, easy to take in and out, yet stay securely in place And Comfy. Nickel & Lead free Hypoallergenic Safe for sensitive ears. (comes with Butterfly back Extra Clear Silicone Bullet Clutch Ear Nuts for Earring Safety Backs and Little Plastic stored box. (conversion : 1 inch = 25.4mm or 1mm = 0.0393 inch)( Post Length 12mm / 7/16" One Size Fits All ) The back of this ear stud is Push Back with 925 Sterling Silver Post and Back Lightweight, easy to take in and out, yet stay securely in place And Comfy. Nickel & Lead free Hypoallergenic Safe for sensitive ears. (comes with Butterfly back Extra Clear Silicone Bullet Clutch Ear Nuts for Earring Safety Backs and Little Plastic stored box.