Features:6 Different Styles and Sizes:100 pieces rubber studs back for each style (total 600pcs), enough for your daily use and replacement.Premium Material: Earring Backs made from soft silicone, latex-free and hypo-allergenic, pliable and comfortable to wear.Easy To Grasp :Bullet earring backs with pad slide onto the posts easily, and they stay on insure earrings not lost. Safely hold your earrings in place.Wide Use:These rubber earring stop back with 1mm hole, match most back pin of earring studs and hold in tight.Hold fishhook earrings, dropping earrings and other earrings in place comfortably, especially the heavy earrings. Package Includes:600 Pieces/set Earring Backs Specifications:Material: SiliconeSize:Approx.0.2cm/0.07inch note:Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.