Features:Soft earring backs are made of clear silicone, pliable and comfortable to wear.Elegant Design:The earring backs for studs secure are curves and dynamic style. They are suitable for fish hooks earrings.This rubber earring backs size fits for most earrings posts. Easy to put on and off.50pcs clutch earring backings, enough for your spare and replacement, keep a long for time use to replace your lost or torn one.Easy to grasp, flexible clutch earring backstop pad slide onto the posts easily, and they stay on insure earrings not lost. Package Includes:50 Pieces/set Earring Backs Specifications:Material: SiliconeStyle: Round for Head/ Double RoundRound Head: Approx.11.5x5.6mm/0.45x0.22inDouble Circle: Approx.11.5x7.5mm/0.45x0.29in 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.