Pearl Cup Earring Posts: Pearl cup with earnut safety backs is small and easy to use,silver is popular and elegant, it is perfect to make some elegant pearl earrings, and excellent product for your jewelry projects. Quantity and Size: Our small setting pearl cup in a great array of designs and sizes, about 3mm in diameter, 13.5mm long, tray: 2.5mm, pin: 0.7mm. Total 40pcs for your daily use, proper size for your pearl earrings, super cute. Material: These earring studs crafted with sterling silver, which is a good material for sensitive ears, not easy to fade and rust, stainless steel ear backs is sturdy and durable, which will prevent the earrings from falling off. Easy to Install: The sterling silver earring is easy to install, great for your jewelry making, backings slide nicely onto the posts, 2.5mm tray is easy to connect with pearls and beads. Wonderful Gifts: The pearl earring post will be a great gift for your friends, mother, or lover as a graduation gift, Mother's Day gift, and romantic gift, they will fall in love with it.