2 Size: Diameter about 12/14mm, width about 3mm, 8 pcs of each size, Pack of 16 pcs,Fit for various sizes round pearl beads, glass beads, acrylic beads as bead frame. Easy to Use: Double hole design, just thread elastic cord from the bottom hole of the frame, add your smaller favrious gemstone beads in between and then through the top hole. Premium material: These jewelry making connectors are made of high quality 201 Stainless Steel, hypoallergenic, light weight, safe and durable for long time use. Wide applications: These round frame links are perfect jewelry making and bead assortment kits for necklaces, bracelets, earrings, keychains, sweater chains, cellphone decorative accessories, etc. Gift Preffered: Work great to combine with other jewelry making accessories as the Christmas gifts, Valentine's gifts and other festival gift to your friends and family.