US to CM / Mondopoint Conversion
US men's 9 equals approximately 27 cm foot length (270 mm on the Mondopoint scale). CM sizing is used in Japan and by many performance brands — it maps directly to foot length without the barleycorn offset that US and UK use.
Try the conversion
| Foot length (mm) | US Men | US Women | UK | EU | CM |
|---|---|---|---|---|---|
| 237 | 6 | 7.5 | 5 | 36 | 23.5 |
| 246 | 7 | 8.5 | 6 | 37 | 24.5 |
| 254 | 8 | 9.5 | 7 | 38 | 25.5 |
| 262 | 9 | 10.5 | 8 | 39 | 26 |
| 271 | 10 | 11.5 | 9 | 41 | 27 |
| 279 | 11 | 12.5 | 10 | 42 | 28 |
| 288 | 12 | 13.5 | 11 | 43 | 29 |
| 296 | 13 | 14.5 | 12 | 44 | 29.5 |
Quick conversion table
| US Men | CM | Foot (mm) |
|---|---|---|
| 6 | 23.5 | 237 |
| 7 | 24.5 | 246 |
| 8 | 25.5 | 254 |
| 9 | 26 | 262 |
| 10 | 27 | 271 |
| 11 | 28 | 279 |
| 12 | 29 | 288 |
| 13 | 29.5 | 296 |
Formula (Layer A): CM = round_to_half(foot_length_mm / 10). See how we calculate for the full methodology.
How to read this conversion
The anchor row converts US Men 9 to 262mm first, then displays it as CM 26. That millimetre anchor is why the same size can be compared against brand and model fit without re-entering the number.
- Foot length in millimetres is the pivot; brand fit is applied later on brand and model pages.
- US men's labels use the barleycorn formula, then round to the nearest half size.
- CM/Mondopoint is closest to the raw measurement: 27.0 CM means roughly a 270mm foot.
Save this conversion as your size passport
Save your foot length once, then compare brand and model sizing without retyping it.
Local-only by default. Share links include foot length, width and note in the URL, so use them only with people you trust.
What CM is US size 9?
US men's 9 equals approximately 27 cm foot length (270 mm Mondopoint).
Brand-specific sizing (Layer B)
Generic charts ignore fit — Nike runs small, New Balance runs large, Converse runs very small. For a purchase-ready answer with confidence score and sources:
Compare brand fit before buying
Length conversion gets you the starting size. Brand fit can still move the label by a half size.
Reverse conversion
Need the other direction? Use CM / Mondopoint to US Shoe Size.