While we always recommend going to a jeweller to get a true fitting, we have provided a printable ring sizer- available here. Make sure to print it at 100% to get an accurate size!
Augustine Jewels is based in the UK so we use UK sizes. If you'd like to know your UK ring size, check out the table below to get equivalent sizes in Europe, the US and Canada.
Find your ring size with our International Conversion Chart
| Ring Diameter (Inside) | Ring Circumference (Inside) | ‹ International Standard Sizes › | ||||
| MM | Inches | MM | Inches | Britan & 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 | · | · |
If you have any questions, please contact us.