Note: The size provided is for the jump ring's outer diameter. Thick jump rings will have a smaller inner diameter due to the metal's thickness. 12 grams Jump Rings: 1 pack contains 12 grams jump rings for DIY jewelry making. It is used as a connector for locks/clasps, pendants, charms, keychains, etc. Rose gold 5mm (5g only) - 100 pcs only (not 12g) Silver 10mm (double ring) - approx 78 pcs Silver 10mm - approx. 82 pcs Silver 8mm (thick) for keychain rings - approx. 60 pcs Silver 8mm (regular) - approx. 100 pcs Silver 7mm - approx. 115 pcs Silver 6mm - approx. 140 pcs Bright Silver 5mm - approx. 240 pcs Gold 10mm (thin) - approx. 63 pcs Gold 8mm (thick) for keychain rings - approx. 56 pcs Gold 6mm - approx. 190 pcs Gold 5mm - approx. 160 pcs Bright silver 9mm - approx. 132 pcs