JP to US clothing size
The short answer
By the formula, JP 13 is US 10.
UK and AU are the US number plus 4; FR is DE plus 2, and IT is FR plus 4. A tag that only says EU is usually the FR or the DE number.
| JP | US |
|---|---|
| 3 | 0 |
| 5 | 2 |
| 7 | 4 |
| 9 | 6 |
| 11 | 8 |
| 13 | 10 |
| 15 | 12 |
| 17 | 14 |
| 19 | 16 |
| 21 | 18 |
| 23 | 20 |