New Ring Size Chart
| Diameter (mm) | Diameter (Inches) | U.S./Canada | U.K/Australia/ New Zealand | France and most E.U. |
| 14.05 | 0.553 | 3 | F | 44 |
| 14.45 | 0.569 | 3.5 | G | 45 |
| 14.86 | 0.585 | 4 | H1/2 1 | 46 |
| 15.27 | 0.601 | 4.5 | 11/2 | 48 |
| 15.7 | 0.618 | 5 | J 1/2 | 49 |
| 16.1 | 0.634 | 5.5 | L | 51 |
| 16.51 | 0.65 | 6 | M | 511/3 |
| 16.92 | 0.666 | 6.5 | N | 53 |
| 17.35 | 0.683 | 7 | O | 54 |
| 17.75 | 0.699 | 7.5 | P | 55 |
| 18.19 | 0.716 | 8 | Q | 57 |
| 18.53 | 0.732 | 8.5 | Q1/2 | 58 |
| 18.89 | 0.748 | 9 | R | 59 |
| 19.41 | 0.764 | 9.5 | S1/4 | 61 |
| 19.84 | 0.781 | 10 | 1/2 | 62 |
| 20.2 | 0.797 | 10.5 | U1/2 | 63 |
| 20.68 | 0.814 | 11 | V1/2 | 64 |
| 21.08 | 0.83 | 11.5 | W | 66 |
| 21.49 | 0.864 | 12 | X | 67 |
| 21.89 | 0.862 | 12.5 | Y 1/2 | 68 |
| 22.33 | 0.897 | 13 | Z | 70 |