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Ring Sizes
Ring sizes are measured in different ways in the USA compared to Britian and Europe. The table below compares European and British standards with the US standard.
BlackHills.com Gold Jewelry uses the US standard for ring sizes. If you are familiar with another standard, please see the table below to find the US equivalent before placing your order.
| British Standard | European Size |
American Size | Inside Diameter | |
| Inches | mm | |||
| 49 | 5 | 0.6141 | 15.597 | |
| J | 0.6145 | 15.6 08 | ||
| J½ | 0.6223 | 15.806 | ||
| 50 | 0.6266 | 15. 916 | ||
| K | 5½ | 0.6300 | 16.002 | |
| K½ | 0.6378 | 16.200 | ||
| 51 | 0.6391 | 16. 234 | ||
| L | 6 | 0.6455 | 16.396 | |
| 52 | 0.6517 | 16. 552 | ||
| L½ | 0.6533 | 16.594 | ||
| M | 0.6610 | 16.7 89 | ||
| 6½ | 0.6620 | 16.815 | ||
| 53 | 0.6642 | 16. 871 | ||
| M½ | 0.6688 | 16.988 | ||
| N | 0.6765 | 17.1 83 | ||
| 54 | 0.6767 | 17. 189 | ||
| 7 | 0.6780 | 17.2 21 | ||
| N½ | 0.6843 | 17.381 | ||
| 55 | 0.6893 | 17. 507 | ||
| O | 0.6920 | 17.5 77 | ||
| 7½ | 0.6940 | 17.628 | ||
| O½ | 0.6998 | 17.775 | ||
| 56 | 0.7018 | 17. 826 | ||
| P | 0.7075 | 17.9 71 | ||
| 8 | 0.7100 | 18.0 34 | ||
| 57 | 0.7143 | 18. 144 | ||
| P½ | 0.7153 | 18.169 | ||
| Q | 0.7230 | 18.3 64 | ||
| 8½ | 0.7265 | 18.453 | ||
| 58 | 0.7269 | 18. 462 | ||
| Q½ | 0.7308 | 18.562 | ||
| R | 0.7385 | 18.7 58 | ||
| 59 | 0.7394 | 18. 780 | ||
| 9 | 0.7430 | 18.8 72 | ||
| R½ | 0.7463 | 18.956 | ||
| 60 | 0.7519 | 19. 098 | ||
| S | 0.7540 | 19.1 52 | ||
| 9½ | 0.7590 | 19.279 | ||
| S½ | 0.7618 | 19.350 | ||
| 61 | 0.7644 | 19. 416 | ||
| T | 0.7695 | 19.5 45 | ||
| 62 | 0.7770 | 19. 736 | ||
| T½ | 0.7772 | 19.741 | ||
| 10 | 0.7780 | 19. 761 | ||
| U | 0.7850 | 19.9 39 | ||
| 63 | 0.7895 | 20. 054 | ||
| U½ | 0.7928 | 20.137 | ||
| 10½ | 0.7940 | 20.168 | ||
| V | 0.8005 | 20.3 33 | ||
| 64 | 0.8020 | 20. 372 | ||
| V½ | 0.8083 | 20.531 | ||
| 11 | 0.8110 | 20. 599 | ||
| 65 | 0.8146 | 20. 690 | ||
| W | 0.8160 | 20.7 26 | ||
| W½ | 0.8238 | 20.925 | ||
| 66 | 11½ | 0.8271 | 21.008 | |
| X | 0.8315 | 21.1 20 | ||
| X½ | 0.8393 | 21.318 | ||
| 67 | 0.8396 | 21. 326 | ||
| 12 | 0.8430 | 21. 412 | ||
| Y | 0.8470 | 21.5 14 | ||
| 68 | 0.8522 | 21. 645 | ||
| Y½ | 0.8548 | 21.712 | ||
| 12½ | 0.8590 | 21.819 | ||
| Z | 0.8625 | 21.9 08 | ||
| 69 | 0.8647 | 21. 963 | ||
| Z½ | 0.8703 | 22.106 | ||
| 13 | 0.8750 | 22. 225 | ||