We always losing backs off of wire earrings, or sometimes need a wider back for a stud. These are great. Since some of we ear holes have stretched (or been stretched), these will keep the earrings where they need to be and not let them fall out.They are soft are very comfortable.earring safety backs are made of clear flexible silicon rubber,High quality rubber has high resistance to rust, corrosion and tarnishing, which requires minimal maintenance. Rubber backing for earring is hypoallergenic. It does not oxidize.Easy to use,bullet earring backs with pad slide easily onto the posts, safely hold your earrings in place without loosening.Ideal handmade jewelry supplies for stud earrings,ear ring or eardrop.Package includes: 100pcs * Earring backs. They were packed in a exquisite plastic box.clutch backs pad diameter is 11 mm and 8 mm in height, hole diameter measures approximately 0.7 mm, small and portable.MONEY BACK GUARANTEE - No question asked',' If these earring backs does not fit your, please feel free to contact us. We will provide 24-hour enthusiastic customer service. Your satisfaction is our first goal.