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Ring Size Chart

 
Inside Diameter

Inside Circumference

Sizes

(in)

(mm)

(in)      
 


(mm)


United States & Canada
United Kingdom, Ireland, Australia & New Zealand  
India, China & Japan


Switzerland
0.459 11.63 1.44 36.5 0
0.466 11.84 1.46 37.2 ¼
0.474 12.04 1.49 37.8 ½ A
0.482 12.24 1.51 38.5 ¾ A ½
0.49 12.45 1.54 39.1 1 B 1
0.498 12.65 1.56 39.7 1 ¼ B ½
0.506 12.85 1.59 40.4 1 ½ C
0.514 13.06 1.61 41 1 ¾ C ½
0.522 13.26 1.64 41.7 2 D 2 1.5
0.53 13.46 1.67 42.3 2 ¼ D ½
0.538 13.67 1.69 42.9 2 ½ E 3 2.75
0.546 13.87 1.72 43.6 2 ¾ E ½
0.554 14.07 1.74 44.2 3 F 4 4
0.562 14.27 1.77 44.8 3 ¼ F ½ 5 5.25
0.57 14.48 1.79 45.5 3 ½ G
0.578 14.68 1.82 46.1 3 ¾ G ½ 6 6.5
0.586 14.88 1.84 46.8 4 H 7
0.594 15.09 1.87 47.4 4 ¼ H ½ 7.75
0.602 15.29 1.89 48 4 ½ I 8
0.61 15.49 1.92 48.7 4 ¾ J 9
0.618 15.7 1.94 49.3 5 J ½ 9
0.626 15.9 1.97 50 5 ¼ K 10
0.634 16.1 1.99 50.6 5 ½ K ½ 10
0.642 16.31 2.02 51.2 5 ¾ L 11.75
0.65 16.51 2.04 51.9 6 L ½ 11 12.75
0.658 16.71 2.07 52.5 6 ¼ M 12
0.666 16.92 2.09 53.1 6 ½ M ½ 13 14
0.674 17.12 2.12 53.8 6 ¾ N
0.682 17.32 2.14 54.4 7 N ½ 14 15.25
0.69 17.53 2.17 55.1 7 ¼ O
0.698 17.73 2.19 55.7 7 ½ O ½ 15 16.5
0.706 17.93 2.22 56.3 7 ¾ P
0.714 18.14 2.24 57 8 P ½ 16 17.75
0.722 18.34 2.27 57.6 8 ¼ Q
0.73 18.54 2.29 58.3 8 ½ Q ½ 17
0.738 18.75 2.32 58.9 8 ¾ R 19
0.746 18.95 2.34 59.5 9 R ½ 18
0.754 19.15 2.37 60.2 9 ¼ S 20.25
0.762 19.35 2.39 60.8 9 ½ S ½ 19
0.77 19.56 2.42 61.4 9 ¾ T 21.5
0.778 19.76 2.44 62.1 10 T ½ 20
0.786 19.96 2.47 62.7 10 ¼ U 21
0.794 20.17 2.49 63.4 10 ½ U ½ 22 22.75
0.802 20.37 2.52 64 10 ¾ V
0.81 20.57 2.54 64.6 11 V ½ 23
0.818 20.78 2.57 65.3 11 ¼ W 25
0.826 20.98 2.59 65.9 11 1/2 W ½ 24
0.834 21.18 2.62 66.6 11 ¾ X
0.842 21.39 2.65 67.2 12 X ½ 25
0.85 21.59 2.67 67.8 12 ¼ Y
0.858 21.79 2.7 68.5 12 ½ Z 26 28.75
0.866 22 2.72 69.1 12 ¾ Z ½
0.874 22.2 2.75 69.7 13 27
0.882 22.4 2.77 70.4 13 ¼ Z1
0.89 22.61 2.8 71 13 ½
0.898 22.81 2.82 71.7 13 ¾ Z2
0.906 23.01 2.85 72.3 14 Z3
0.914 23.22 2.87 72.9 14 ¼
0.922 23.42 2.9 73.6 14 ½ Z4
0.93 23.62 2.92 74.2 14 ¾
0.938 23.83 2.95 74.8 15
0.946 24.03 2.97 75.5 15 ¼
0.954 24.23 3 76.1 15 ½
0.962 24.43 3.02 76.8 15 ¾
0.97 24.64 3.05 77.4 16