UK / AU to US / Canada ring size
The short answer
By the formula, UK / AU P is US / Canada 7.75.
Inner circumference 56.3 mm. Ring sizes are defined by that one measurement, so this conversion is exact up to rounding: US sizes are rounded to the nearest quarter, UK letters to the nearest half.
| UK / AU | US / Canada |
|---|---|
| F | 2.75 |
| G | 3.25 |
| H | 3.75 |
| I | 4.25 |
| J | 4.75 |
| K | 5.25 |
| L | 5.75 |
| M | 6.25 |
| N | 6.75 |
| O | 7.25 |
| P | 7.75 |
| Q | 8.25 |
| R | 8.75 |
| S | 9.25 |
| T | 9.75 |
| U | 10.25 |
| V | 10.75 |
| W | 11.25 |
| X | 11.75 |
| Y | 12.25 |
| Z | 12.75 |