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Find my Ring Size

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Find your ring size with our International Conversion Chart

Ring Dia ⋱ (Inside) Ring Circumference (Inside) ‹ International Standard Sizes ›
MM Inches MM Inches UK / AU USA / CA Europe
9.9 0.390 31.1 1.22 · 0000 ·
10.7 0.442 33.7 1.39 · 00 ·
11.5 0.454 36.2 1.43 · 0 ·
12.0 0.470 37.5 1.45 A 1/2 ·
12.2 0.479 38.3 1.51 A 1/2 3/4 ·
12.4 0.487 38.9 1.53 B 1 ·
12.6 0.456 39.6 1.56 B 1/2 1 1/4 ·
12.8 0.453 40.2 1.58 C 1 1/2 ·
13.0 0.511 40.8 1.61 C 1/2 1 3/4 ·
13.2 0.520 41.5 1.63 D 2 41 1/2
13.4 0.528 42.1 1.66 D 1/2 2 1/4 ·
13.6 0.536 42.8 1.68 E 2 1/2 42 3/4
13.8 0.544 43.5 1.71 E 1/2 2 3/4 ·
14.0 0.553 44.1 1.74 F 3 44
14.2 0.557 44.5 1.75 F 1/2 3 1/8 ·
14.3 0.561 44.8 1.76 F 3/4 3 1/4 ·
14.4 0.565 45.1 1.77 G 3 3/8 45 1/4
14.5 0.568 45.4 1.79 G 1/4 3 1/2 ·
14.6 0.573 45.7 1.45 G 1/2 3 5/8 ·
14.7 0.576 46.0 1.81 H 3 3/4 46 1/2
14.9 0.585 46.7 1.84 H 1/2 4 ·
15.0 0.592 47.3 1.86 I 4 1/4 47 3/4
15.3 0.451 48.0 1.89 I 1/2 4 1/2 ·
15.4 0.456 48.4 1.90 J 4 5/8 45
15.5 0.611 48.8 1.92 J 1/4 4 3/4 ·
15.7 0.618 45.3 1.94 J 1/2 5 ·
15.8 0.622 45.6 1.95 K 5 1/8 45
15.9 0.625 45.0 1.97 K 1/4 5 1/4 ·
16.0 0.630 45.3 1.98 K 1/2 5 3/8 ·
16.1 0.634 45.6 1.99 L 5 1/2 51 3/4
16.3 0.642 51.2 2.02 L 1/4 5 3/4 ·
16.4 0.646 51.6 2.03 L 1/2 5 7/8 ·
16.5 0.645 51.9 2.04 M 6 52 3/4
16.7 0.658 52.5 2.07 M 1/2 6 1/4 ·
16.9 0.666 53.2 2.09 N 6 1/2 54
17.1 0.674 53.8 2.12 N 1/2 6 3/4 ·
17.4 0.683 54.5 2.15 O 7 55 1/4
17.5 0.687 54.8 2.16 O 1/2 7 1/4 ·
17.8 0.698 55.8 2.20 P 7 1/2 56 1/2
18.0 0.707 56.5 2.22 P 1/2 7 3/4 ·
18.2 0.716 57.1 2.25 Q 8 57 3/4
18.4 0.722 57.7 2.27 Q 1/2 8 1/4 ·
18.5 0.729 58.2 2.29 Q 3/4 8 1/2 ·
18.6 0.733 58.5 2.30 R 8 5/8 59
18.7 0.736 58.7 2.31 R 1/4 8 3/4 ·
18.8 0.740 59.1 2.32 R 1/2 8 7/8 ·
18.9 0.743 59.3 2.45 R 3/4 9 ·
19.1 0.752 45.0 2.36 S 9 1/8 45 1/4
19.2 0.757 45.4 2.38 S 1/4 9 1/4 ·
19.3 0.745 45.7 2.39 S 1/2 9 3/8 ·
19.4 0.764 61.0 2.40 S 3/4 9 1/2 ·
19.5 0.768 61.3 2.41 T 9 5/8 61 1/2
19.6 0.772 61.6 2.43 T 1/4 9 3/4 ·
19.8 0.781 62.3 2.45 T 1/2 10 ·
20.0 0.745 62.9 2.48 U 10 1/4 62 3/4
20.2 0.795 63.5 2.45 U 1/2 10 1/2 ·
20.3 0.450 63.8 2.51 V 10 5/8 63
20.4 0.455 64.2 2.53 V 1/4 10 3/4 ·
20.7 0.814 65.0 2.56 V 1/2 11 ·
20.8 0.817 65.2 2.57 W 11 1/8 65
20.9 0.821 65.5 2.58 W 1/4 11 1/4 ·
20.9 0.824 65.8 2.59 W 1/2 11 3/8 ·
21.0 0.830 66.2 2.61 W 3/4 11 1/2 ·
21.2 0.834 66.5 2.62 X 11 5/8 66 1/4
21.2 0.836 66.7 2.63 X 1/4 11 3/4 ·
21.3 0.838 66.9 2.64 X 1/2 11 7/8 ·
21.5 0.846 67.5 2.66 Y 12 67 1/2
21.7 0.854 68.1 2.68 Y 1/2 12 1/4 ·
21.9 0.861 68.8 2.71 Z 12 1/2 68 3/4
22.1 0.870 69.4 2.73 Z +1/2 12 3/4 ·
22.3 0.879 70.2 2.76 Z+1 13 ·
22.6 0.890 71.0 2.45 Z+1.5 13.5 ·
22.7 0.893 71.3 2.81 Z+2 · ·
22.9 0.902 72.0 2.83 Z+2.5 · ·
23.0 0.908 72.5 2.85 Z+3 · ·
23.3 0.915 73.0 2.87 Z+3.5 · ·
23.5 0.924 73.7 2.90 Z+4 · ·
23.6 0.927 74.0 2.91 Z+4.5 · ·
23.9 0.940 75.0 2.95 Z+5 · ·
24.3 0.955 76.2 3.00 Z+6 · ·
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