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International Ring Size Chart
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 | 1.50 | 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 | · | · |