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Ring Size Guide


Inside diameterInside circumferenceSizes
(in)(mm)(in)(mm)USAUKJapanEuropean
0.53 13.46 1.67 42.3 2¼ D½   2.25
0.538 13.67 1.69 42.9 2½ E 3 3
0.546 13.87 1.72 43.6 2¾ E½   3.5
0.554 14.07 1.74 44.2 3 F 4 4.25
0.562 14.27 1.77 44.8 3¼ F½ 5 4.75
0.57 14.48 1.79 45.5 3½ G   5.5
0.578 14.68 1.82 46.1 3¾ G½ 6 6
0.586 14.88 1.84 46.8 4 H 7 6.75
0.594 15.09 1.87 47.4 4¼ H½   7.5
0.602 15.29 1.89 48 4½ I 8 8
0.61 15.49 1.92 48.7 4¾ J   8.75
0.618 15.7 1.94 49.3 5 J½ 9 9.25
0.626 15.9 1.97 50 5¼ K   10
0.634 16.1 1.99 50.6 5½ K½ 10 10.5
0.642 16.31 2.02 51.2 5¾ L   11.25
0.65 16.51 2.04 51.9 6 L½ 11 11.75
0.658 16.71 2.07 52.5 6¼ M 12 12.5
0.666 16.92 2.09 53.1 6½ M½ 13 13.25
0.674 17.12 2.12 53.8 6¾ N   13.75
0.682 17.32 2.14 54.4 7 N½ 14 14.5
0.69 17.53 2.17 55.1 7¼ O   15
0.698 17.73 2.19 55.7 7½ O½ 15 15.75
0.706 17.93 2.22 56.3 7¾ P   16.25
0.714 18.14 2.24 57 8 P½ 16 17
0.722 18.34 2.27 57.6 8¼ Q   17.5
0.73 18.54 2.29 58.3 8½ Q½ 17 18.25
0.738 18.75 2.32 58.9 8¾ R   19
0.746 18.95 2.34 59.5 9 R½ 18 19.5
0.754 19.15 2.37 60.2 9¼ S   20.25
0.762 19.35 2.39 60.8 9½ S½ 19 20.75
0.77 19.56 2.42 61.4 9¾ T   21.5
0.778 19.76 2.44 62.1 10 T½ 20 22
0.786 19.96 2.47 62.7 10¼ U 21 22.75
0.794 20.17 2.49 63.4 10½ U½ 22 23.25
0.802 20.37 2.52 64 10¾ V   24
0.81 20.57 2.54 64.6 11 V½ 23 24.75
0.818 20.78 2.57 65.3 11¼ W   25.25
0.826 20.98 2.59 65.9 11½ W½ 24 26
0.834 21.18 2.62 66.6 11¾ X   26.5
0.842 21.39 2.65 67.2 12 X½ 25 27.25
0.85 21.59 2.67 67.8 12¼ Y   27.75
0.858 21.79 2.7 68.5 12½ Z 26 28.5
0.866 22 2.72 69.1 12¾ Z½   29
0.874 22.2 2.75 69.7 13   27 29.75
0.882 22.4 2.77 70.4 13¼ Z1   30.5
0.89 22.61 2.8 71 13½     31
0.898 22.81 2.82 71.7 13¾ Z2   31.75
0.906 23.01 2.85 72.3 14 Z3   32.25
0.914 23.22 2.87 72.9 14¼     33
0.922 23.42 2.9 73.6 14½ Z4   33.5
0.93 23.62 2.92 74.2 14¾     34.25
0.938 23.83 2.95 74.8 15     34.75
0.946 24.03 2.97 75.5 15¼     35.5
0.954 24.23 3 76.1 15½     36.25
0.962 24.43 3.02 76.8 15¾     36.75
0.97 24.64 3.05 77.4 16     37.5