View the chart below to see how US sizes map to finger circumference and convert to international sizes.
All Brilliant Earth rings are crafted in standard US sizes. Engagement rings, wedding bands, and fashion rings for both men and women all follow the same size format.
| Inside Circumference | US, Canada, Mexico | UK, Australia, Ireland, New Zealand, South Africa | France | Germany, Russia, Ukraine, Asia | India, China, Japan, South America, Turkey, Israel | Italy, Spain, Netherlands, Switzerland | |
|---|---|---|---|---|---|---|---|
| IN | MM | ||||||
| 1.74 | 44.2 | 3 | F | 44 | 14 | 4 | 4 |
| 1.77 | 44.8 | 3.25 | F 1/2 | 45 | 14 1/4 | --- | 4 5/8 |
| 1.79 | 45.5 | 3.5 | G | 45.5 | 14 1/2 | 5 | 5 1/4 |
| 1.82 | 46.1 | 3.75 | G 1/2 | 46 | 14 3/4 | 6 | 5 7/8 |
| 1.84 | 46.8 | 4 | H | 47 | 15 | 7 | 6 1/2 |
| 1.87 | 47.4 | 4.25 | H 1/2 | 47.5 | --- | --- | 7 1/8 |
| 1.89 | 48 | 4.5 | I | 48 | 15 1/4 | 8 | 7 3/4 |
| 1.92 | 48.7 | 4.75 | J | 48.5 | 15 1/2 | --- | 8 3/8 |
| 1.94 | 49.3 | 5 | J 1/2 | 49 | 15 3/4 | 9 | 9 |
| 1.97 | 50 | 5.25 | K | 50 | 16 | --- | 9 5/8 |
| 1.99 | 50.6 | 5.5 | K 1/2 | 50.5 | 16 1/4 | 10 | 10 1/4 |
| 2.02 | 51.2 | 5.75 | L | 51 | --- | 11 | 10 7/8 |
| 2.04 | 51.9 | 6 | L 1/2 | 52 | 16 1/2 | 12 | 11 1/2 |
| 2.07 | 52.5 | 6.25 | M | 52.5 | 16 3/4 | --- | 12 1/8 |
| 2.09 | 53.1 | 6.5 | M 1/2 | 53 | 17 | 13 | 12 3/4 |
| 2.12 | 53.8 | 6.75 | N | 54 | --- | --- | 13 3/8 |
| 2.14 | 54.4 | 7 | N 1/2 | 54.5 | 17 1/4 | 14 | 14 |
| 2.17 | 55.1 | 7.25 | O | 55 | 17 1/2 | --- | 14 5/8 |
| 2.19 | 55.7 | 7.5 | O 1/2 | 56 | 17 3/4 | 15 | 15 1/4 |
| 2.22 | 56.3 | 7.75 | P | 56.5 | 18 | --- | 15 7/8 |
| 2.24 | 57 | 8 | P 1/2 | 57 | --- | 16 | 16 1/2 |
| 2.27 | 57.6 | 8.25 | Q | 58 | 18 1/4 | --- | 17 1/8 |
| 2.29 | 58.3 | 8.5 | Q 1/2 | 58.5 | 18 1/2 | 17 | 17 3/4 |
| 2.32 | 58.9 | 8.75 | R | 59 | 18 3/4 | --- | 18 3/8 |
| 2.34 | 59.5 | 9 | R 1/2 | 60 | 19 | 18 | 19 |
| 2.37 | 60.2 | 9.25 | S | 60.5 | 19 1/4 | --- | 19 5/8 |
| 2.39 | 60.8 | 9.5 | S 1/2 | 61 | 19 1/2 | 19 | 20 1/4 |
| 2.42 | 61.4 | 9.75 | T | 61.5 | --- | --- | 20 7/8 |
| 2.44 | 62.1 | 10 | T 1/2 | 62 | 19 3/4 | 20 | 21 1/2 |
| 2.47 | 62.7 | 10.25 | U | 63 | 20 | 21 | 22 1/8 |
| 2.49 | 63.4 | 10.5 | U 1/2 | 63.5 | --- | 22 | 22 3/4 |
| 2.52 | 64 | 10.75 | V | 64 | 20 1/2 | --- | 23 3/8 |
| 2.54 | 64.6 | 11 | V 1/2 | 65 | 20 3/4 | 23 | 24 |
| 2.57 | 65.3 | 11.25 | W | 65.5 | --- | --- | 24 5/8 |
| 2.59 | 65.9 | 11.5 | W 1/2 | 66 | 21 | 24 | 25 1/4 |
| 2.62 | 66.6 | 11.75 | X | 67 | 21 1/4 | --- | 25 7/8 |
| 2.65 | 67.2 | 12 | X 1/2 | 67.5 | 21 1/2 | 25 | 26 1/2 |
| 2.68 | 68.1 | 12.25 | Y | 68 | --- | --- | 27 1/8 |
| 2.71 | 68.5 | 12.5 | Z | 69 | 21 3/4 | 26 | 27 3/4 |
| 2.72 | 69.1 | 12.75 | Z 1/2 | 69.5 | --- | --- | 28 3/8 |
| 2.75 | 69.7 | 13 | --- | 70 | 22 | 27 | 29 |
