Some reputable jeweller's rings are specified in standard US sizes. View the conversion chart below to see how US sizes map to finger circumference, as well as how US sizes convert to Canada, Australia, Mexico, New Zealand, UK, Ireland, South Africa, France, Germany, Russia, Japan, India, China, Singapore, South America, Turkey, Italy, Spain, Netherlands & Switzerland ring sizes.
Check your ring size measurement with the international ring sizes chart below to determine your ring size. If your size seems to sit between two sizes displayed then you'll go with the higher of the two sizes:
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| Circumference | USA, Canada & Mexico | Australia, New Zealand, UK, Ireland & South Africa | France | Germany & Russia | Japan, India, China, Singapore, South America & Turkey | Italy, Spain, Netherlands & Switzerland | |
|---|---|---|---|---|---|---|---|
| Inches | MM | ||||||
| 1.74 | 44 2 | 3 | F | 44 | 14 | 4 | 4 |
| 1.77 | 44.9 | 3.25 | F-1/2 | 44.625 | 14.25 | 5 | 4.625 |
| 1.79 | 45.5 | 3.5 | G | 45.25 | 14.5 | --- | 5.25 |
| 1.82 | 46.1 | 3.75 | G-1/2 | 45.875 | 14.75 | 6 | 5.875 |
| 1.84 | 46.8 | 4 | H | 46.5 | 15 | 7 | 6.5 |
| 1.87 | 47.4 | 4.25 | H-1/2 | 47.125 | 15.25 | --- | 7.125 |
| 1.89 | 48 | 4.5 | I | 47.75 | 15.5 | 8 | 7.75 |
| 1.92 | 48.7 | 4.75 | I-1/2 | 48.375 | --- | --- | 8.375 |
| 1.94 | 49.3 | 5 | J | 49 | 15.75 | 9 | 9 |
| 1.97 | 50 | 5.25 | J-1/2 | 49.625 | 16 | --- | 9.625 |
| 1.99 | 50.6 | 5.5 | K | 50.25 | 16.25 | 10 | 10.25 |
| 2.02 | 51.2 | 5.75 | K-1/2 | 50.875 | --- | 11 | 10.875 |
| 2.04 | 51.9 | 6 | L | 51.5 | 16.5 | 12 | 11.5 |
| 2.07 | 52.5 | 6.25 | L-1/2 | 52.125 | 16.75 | --- | 12.125 |
| 2.09 | 53.1 | 6.5 | M | 52.75 | 17 | 13 | 12.75 |
| 2.12 | 53.8 | 6.75 | M-1/2 | 53.375 | --- | --- | 13.375 |
| 2.14 | 54.7 | 7 | N | 54 | 17.25 | 14 | 14 |
| 2.17 | 55.1 | 7.25 | N-1/2 | 54.625 | 17.5 | --- | 14.625 |
| 2.19 | 55.7 | 7.5 | O | 55.25 | 17.75 | 15 | 15.25 |
| 2.22 | 56.3 | 7.75 | O-1/2 | 55.875 | --- | --- | 15.875 |
| 2.24 | 57 | 8 | P | 56.5 | 18 | 16 | 16.5 |
| 2.27 | 57.6 | 8.25 | P-1/2 | 57.125 | 18.25 | --- | 17.125 |
| 2.29 | 58.3 | 8.5 | Q | 57.75 | 18.5 | 17 | 17.75 |
| 2.32 | 58.9 | 8.75 | Q-1/2 | 58.375 | 18.75 | --- | 18.375 |
| 2.34 | 59.5 | 9 | R | 59 | 19 | 18 | 19 |
| 2.37 | 60.2 | 9.25 | R-1/2 | 59.625 | 19.25 | --- | 19.625 |
| 2.39 | 60.8 | 9.5 | S | 60.25 | 19.5 | 19 | 20.25 |
| 2.42 | 61.4 | 9.75 | S-1/2 | 60.875 | 19.75 | --- | 20.875 |
| 2.44 | 62.1 | 10 | T | 61.5 | 20 | 20 | 21.5 |
| 2.47 | 62.7 | 10.25 | T-1/2 | 62.125 | 20.25 | 21 | 22.125 |
| 2.49 | 63.4 | 10.5 | U | 62.75 | 20.5 | 22 | 22.75 |
| 2.52 | 64 | 10.75 | U-1/2 | 63.375 | --- | --- | 23.375 |
| 2.54 | 64.6 | 11 | V | 64 | 20.75 | 23 | 24 |
| 2.57 | 65.3 | 11.25 | V-1/2 | 64.625 | --- | --- | 24.625 |
| 2.59 | 65.9 | 11.5 | W | 65.25 | 21 | 24 | 25.25 |
| 2.62 | 66.6 | 11.75 | W-1/2 | 65.875 | --- | --- | 25.875 |
| 2.65 | 67.2 | 12 | X | 66.5 | 21.25 | 25 | 26.5 |
| 2.67 | 67.8 | 12.25 | X-1/2 | 67.125 | 21.5 | --- | 27.125 |
| 2.70 | 68.5 | 12.5 | Y | 67.75 | 21.75 | 26 | 27.75 |
| 2.72 | 69.1 | 12.75 | Z | 68.375 | --- | --- | 28.375 |
| 2.75 | 69.7 | 13 | Z-1/2 | 69 | 22 | 27 | 29 |
International ring size - Conversion chart.
