US numeric to JP jeans size
The short answer
By the formula, US numeric 10 is JP 13.
No brand chart we have checked prints both systems, so this table is the arithmetic alone. Treat it as the label convention, not a fit.
| US numeric | JP |
|---|---|
| 00 | 1 |
| 0 | 3 |
| 2 | 5 |
| 4 | 7 |
| 6 | 9 |
| 8 | 11 |
| 10 | 13 |
| 12 | 15 |
| 14 | 17 |
| 16 | 19 |
| 18 | 21 |
| 20 | 23 |