5 mm Split Rings: Each split ring is about 5 mm in outer diameter, 3.8 mm in inner diameter, 14 gauge, 1.2 mm thick; about 290 pieces/20g in total. Suitable size for hanging pendants. High-Quality Material: Our double jump rings are made of 304 stainless steel, corrosion-resistant, rust-proof, lightweight, sturdy, and durable. It is recommended to use pliers to open. Easy to Use: These split jump rings are perfect for any project you have, whether it's making chainmail, trying a new weave, making spectacular jewelry, or anything else! Multiple Uses: Split jump rings are used as connectors where a single ring is needed. Widely used in jewelry making, arts, crafts, DIY, etc. Wide Range of Applications: Perfect for making your special and unique jewelry, just the right size for hanging delicate earrings, necklaces, chokers, bracelets, anklets, keychains, and other small items.