50g in 1 packet jump rings, except for 3mm size jump rings is 40g per packet. Size: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 20mm Color: Silver, Rhodium, Gold, KC Gold, Black and Bronze You can get from us at https://www.bjscraftandjewelry.com FOR REFERENCE ONLY: 3mm thickness 0.5mm, 40克/2400pcs approx, 4mm thickness 0.7mm, 50克/1400pcs approx, 5mm thickness 0.7mm, 50克/1000pcs approx, 6mm thickness 0.7mm, 50克/600pcs approx, 7mm thickness 0.7mm, 50克/500pcs approx, 8mm thickness 0.9mm, 50克/400pcs approx， 10mm thickness 1mm, 50克/300pcs approx, 12mm thickness 1mm, 50克/150pcs approx， 20mm thickness 1.8mm, 50克/40pcs approx