3mm Open Jump Ring- Wire Thickness 0.030 (please refer to conversion chart for wire   gauge equivalences) Each ring weighs approximately 0.03grams

4.5mm Open Jump Ring- Wire Thickness 0.035 (please refer to conversion chart for wire gauge equivalences) Each ring weighs approximately 0.07grams

Silver 5.5mm Open Jump Ring- Wire Thickness 0.040 (please refer to conversion chart for wire gauge equivalences) Each ring weighs approximately 0.12grm
 
6.8mm Open Jump Ring-Wire Thickness 0.040 (please refer to conversion chart for wire gauge equivalences) Each ring weighs approximately 0.15grm