PandaHall Elite About 480 Pcs 304 Stainless Steel Open Jump Rings Diameter 4mm Wire 21-Gauge for Jewelry Making Size: The dimensions of the rings are about 4/25 inch(4mm) outside diameter. Quantity: about 480pcs in total. Thickness: The wire is about 21AWG/22SWG or 0.04inch(0.7mm) in diameter. Usage: Jump rings are used as a connector where a single ring is desired. Widely used on jewelry making, arts, crafts, DIY and so on. Easy to Use: These jump rings are perfect for any project you have, whether to make chainmail armor, try out new weaves, make spectacular jewelry items or something else entirely! Wide Application: Great for DIY your special & unique jewelry, excellent size for suspending small items from delicate necklaces, bracelets, anklets.