UK / AU to Swiss / IT / ES ring size
The short answer
By the formula, UK / AU P is Swiss / IT / ES 16.
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 | Swiss / IT / ES |
|---|---|
| F | 4 |
| G | 5 |
| H | 6 |
| I | 8 |
| J | 9 |
| K | 10 |
| L | 11 |
| M | 13 |
| N | 14 |
| O | 15 |
| P | 16 |
| Q | 18 |
| R | 19 |
| S | 20 |
| T | 21 |
| U | 23 |
| V | 24 |
| W | 25 |
| X | 26 |
| Y | 28 |
| Z | 29 |