Ring Size Chart

Suttons and Robertsons, being located in the United Kingdom, utilise UK sizing standards. If you wish to determine your UK ring size, please refer to the chart below for corresponding sizes in Europe, the United States, and Canada.

 

Find your ring size 

Ring Diameter (Inside) Ring Circumference (Inside) ‹ International Standard Sizes ›
MM Inches MM Inches Britain & Australia USA & Canada 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 1.50 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 0.506 39.6 1.56 B 1/2 1 1/4 ·
12.8 0.503 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 1.80 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 0.601 48.0 1.89 I 1/2 4 1/2 ·
15.4 0.606 48.4 1.90 J 4 5/8 50
15.5 0.611 48.8 1.92 J 1/4 4 3/4 ·
15.7 0.618 50.3 1.94 J 1/2 5 ·
15.8 0.622 50.6 1.95 K 5 1/8 50
15.9 0.625 50.0 1.97 K 1/4 5 1/4 ·
16.0 0.630 50.3 1.98 K 1/2 5 3/8 ·
16.1 0.634 50.6 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 0.650 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 2.35 R 3/4 9 ·
19.1 0.752 60.0 2.36 S 9 1/8 60 1/4
19.2 0.757 60.4 2.38 S 1/4 9 1/4 ·
19.3 0.760 60.7 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 0.780 62.9 2.48 U 10 1/4 62 3/4
20.2 0.795 63.5 2.50 U 1/2 10 1/2 ·
20.3 0.800 63.8 2.51 V 10 5/8 63
20.4 0.805 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 2.80 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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