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Ring Size Chart
| British & Australian | US & Canada | French / Pandora | Inside Circumference (mm) | Inside Diameter (cm) |
|---|---|---|---|---|
| D | 2 | 41 1/2 | 41.7 | 13.26 |
| E | 2 1/2 | 42 3/4 | 42.9 | 13.67 |
| F | 3 | 44 | 44.2 | 14.07 |
| G | 3 3/8 | 45 1/2 | 45.5 | 14.48 |
| H | 3 3/4 | 46 1/2 | 46.8 | 14.88 |
| I | 4 1/4 | 47 3/4 | 48 | 15.29 |
| J | 4 5/8 | 49 | 48.7 | 15.49 |
| K | 5 1/8 | 50 | 50 | 15.9 |
| L | 5 1/2 | 51 3/4 | 51.2 | 16.31 |
| M | 6 | 52 3/4 | 52.5 | 16.71 |
| N | 6 1/2 | 54 | 53.8 | 17.12 |
| O | 7 | 55 1/4 | 55.1 | 17.53 |
| P | 7 1/2 | 56 1/2 | 56.3 | 17.93 |
| Q | 8 | 57 3/4 | 57.6 | 18.34 |
| R | 8 5/8 | 59 | 58.9 | 18.75 |
| S | 9 1/8 | 60 1/4 | 60.2 | 19.15 |
| T | 9 5/8 | 61 1/2 | 61.4 | 19.56 |
| U | 10 1/4 | 62 3/4 | 62.7 | 19.96 |
| V | 10 5/8 | 63 | 64 | 20.37 |
| W | 11 1/8 | 65 | 65.3 | 20.78 |
| X | 11 5/8 | 66 1/4 | 66.6 | 21.18 |
| Y | 12 | 67 1/2 | 67.8 | 21.59 |
| Z | 12 1/2 | 68 3/4 | 68.5 | 21.79 |