AlphaAcc 1510 Antique Bronzed Jump Rings 4mm to 9mm with Plastic Container Sizes range: 4mmx0.6mm(500pcs),5mmx0.6mm(300pcs)5mmx0.8mm(250pcs),6x0.7mm(200pcs),7mmx0.9mm(100pcs),8mmx1.2mm(80pcs),9mmx1mm(80pcs) 20 gauge,good quality Antique Bronze appearance,Large variety of sizes Box size: 6.2x1.4x0.72 inches A lot of jump rings in each compartment.If you're looking at making jewelry that uses a lot of different sizes of jump rings, these will work well for your projects. General for jewelry makers. DIY your necklace or any other jewelry making handmade crafts