This pack contains 30 pieces or 15 pairs of secure locking earring backs measuring approximately 4 mm x 6 mm, designed to fit most standard earring posts for reliable replacement and daily use. Made from lightweight, hypoallergenic materials that provide a comfortable fit and firm grip, helping keep stud earrings securely in place without loosening throughout the day. The compact size allows easy storage and portability for travel, with a tight hold suitable for various types of stud earrings, replacement posts, and jewelry finds. Suitable for earring repair, jewelry making supplies, handmade accessories, bead and charm projects, and creative DIY earring crafting for parties, weddings, holidays, and everyday wear. This pack contains 30 pieces or 15 pairs of secure locking earring backs measuring approximately 4 mm x 6 mm, designed to fit most standard earring posts for dependable replacement and daily wear. Crafted from lightweight, hypoallergenic materials, each back provides a comfortable fit and firm grip to keep stud earrings securely in place without loosening. The compact design allows convenient storage and easy portability for travel, while offering reliable support for various stud earrings and jewelry findings. Ideal for earring repair, jewelry making supplies, bead and charm projects, handmade accessories, and creative DIY earring crafting for parties, weddings, holidays, and everyday use.