We are the FIRST to offer this solution, with your comfort top of mind! The FLAT backing is easily removable so you can change your earrings as you wish. The short, adjustable post means no poke and secure sleep-in comfort. This lab diamond stud is more metal and more substance on the ear to give a larger presence. This stud earring has a smooth rounded back, making them exceptionally comfortable. Back-Off studs have a SHORT POST with two adjustable lengths (5mm and 6.5mm) Sold as a single. Dimensions: Small = 0.06 ct, 0.20" diameter (5mm), Large = 0.25 ct, 0.30" diameter (7.5mm) Recycled sterling silver, nickel free, rhodium plated. Hypoallergenic.