This ring size chart makes it easy to find the right fit. It shows ring sizes in inches and matches them with US, UK, EU, Canada, and Australia sizes. Since Canada uses the same sizing as the US, and Australia follows the UK system, we’ve included that too. Just measure the inside of your ring in inches, then check the chart to see what size it matches in each country. This is super helpful if you’re buying a ring online or from a store in another country.
When shopping for rings online or while traveling, knowing your correct size in another country’s system can save time and hassle. You can measure the inside of a ring that already fits you using a ruler or caliper, then check this chart to find the matching size. Using this chart helps you avoid mistakes. A ring that fits well feels good and stays in place. Whether you’re buying for yourself or someone else, knowing the correct size saves time and hassle. If you’re unsure of the size, start by measuring a ring that fits well, or visit a jeweler for help. Once you have the inside diameter, just look it up on the chart and you’re good to go!
Ring Sizes Conversion Chart in Inches
| Inside Diameter (inches) | Inside Circumference (inches) | US/CA Size | UK/AU Size | EU Size |
|---|---|---|---|---|
| 0.458 | 1.439 | 3 | F | 44 |
| 0.466 | 1.464 | 3.25 | F½ | 45 |
| 0.474 | 1.489 | 3.5 | G | 46 |
| 0.482 | 1.514 | 3.75 | G½ | 47 |
| 0.490 | 1.539 | 4 | H | 48 |
| 0.498 | 1.564 | 4.25 | H½ | 49 |
| 0.506 | 1.589 | 4.5 | I | 50 |
| 0.514 | 1.614 | 4.75 | I½ | 51 |
| 0.522 | 1.639 | 5 | J | 52 |
| 0.530 | 1.664 | 5.25 | J½ | 53 |
| 0.538 | 1.689 | 5.5 | K | 54 |
| 0.546 | 1.715 | 5.75 | K½ | 55 |
| 0.554 | 1.740 | 6 | L | 56 |
| 0.562 | 1.765 | 6.25 | L½ | 57 |
| 0.570 | 1.790 | 6.5 | M | 58 |
| 0.578 | 1.815 | 6.75 | M½ | 59 |
| 0.586 | 1.840 | 7 | N | 60 |
| 0.594 | 1.865 | 7.25 | N½ | 61 |
| 0.602 | 1.890 | 7.5 | O | 62 |
| 0.610 | 1.915 | 7.75 | O½ | 63 |
| 0.618 | 1.940 | 8 | P | 64 |
| 0.626 | 1.965 | 8.25 | P½ | 65 |
| 0.634 | 1.990 | 8.5 | Q | 66 |
| 0.642 | 2.015 | 8.75 | Q½ | 67 |
| 0.650 | 2.041 | 9 | R | 68 |
| 0.658 | 2.066 | 9.25 | R½ | 69 |
| 0.666 | 2.091 | 9.5 | S | 70 |
| 0.674 | 2.116 | 9.75 | S½ | 71 |
| 0.682 | 2.141 | 10 | T | 72 |
| 0.690 | 2.166 | 10.25 | T½ | 73 |
| 0.698 | 2.191 | 10.5 | U | 74 |
| 0.706 | 2.216 | 10.75 | U½ | 75 |
| 0.714 | 2.241 | 11 | V | 76 |
| 0.722 | 2.266 | 11.25 | V½ | 77 |
| 0.730 | 2.291 | 11.5 | W | 78 |
| 0.738 | 2.316 | 11.75 | W½ | 79 |
| 0.746 | 2.341 | 12 | X | 80 |
| 0.754 | 2.366 | 12.25 | X½ | 81 |
| 0.762 | 2.391 | 12.5 | Y | 82 |
| 0.770 | 2.416 | 12.75 | Y½ | 83 |
| 0.778 | 2.441 | 13 | Z | 84 |