Usage : Measuring the size of a finger ring Material: zinc alloy Size: standard US size 0-13 Usage : To measure the number of finger size ， then buy the right ring according to the corresponding number of the ring size Color: silver Unit weight: 3 5 g Diameter: 0: 11.6 1: 12.4 2: 13.2 3: 14 4: 14.8 5: 15.7 6: 16.5 7: 17.3 8: 18.2 9: 19 10: 19.8 11: 20.7 12: 21.5 13: 22.3 Package:1 x Ring sizing gauge