CM / Mondopoint to US Shoe Size
Mondopoint (CM) is the most honest sizing axis: it is your foot length in centimetres. US 9 corresponds to roughly 27 cm (270 mm). We recommend measuring in millimetres and converting through the canonical axis rather than trusting label-to-label charts alone.
Try the conversion
| Foot length (mm) | US Men | US Women | UK | EU | CM |
|---|---|---|---|---|---|
| 240 | 6.5 | 8 | 5.5 | 36 | 24 |
| 250 | 7.5 | 9 | 6.5 | 38 | 25 |
| 260 | 8.5 | 10 | 7.5 | 39 | 26 |
| 270 | 10 | 11.5 | 9 | 41 | 27 |
| 280 | 11 | 12.5 | 10 | 42 | 28 |
| 290 | 12.5 | 14 | 11.5 | 44 | 29 |
| 300 | 13.5 | 15 | 12.5 | 45 | 30 |
| 310 | 14.5 | 16 | 13.5 | 47 | 31 |
Quick conversion table
| CM | US Men | Foot (mm) |
|---|---|---|
| 24 | 6.5 | 240 |
| 25 | 7.5 | 250 |
| 26 | 8.5 | 260 |
| 27 | 10 | 270 |
| 28 | 11 | 280 |
| 29 | 12.5 | 290 |
| 30 | 13.5 | 300 |
| 31 | 14.5 | 310 |
Formula (Layer A): US men = round_to_half((cm / 2.54 × 3) − 22). See how we calculate for the full methodology.
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What US size is 27 cm foot length?
A 27 cm (270 mm) foot typically equals US men's 9 on the barleycorn formula — Mondopoint is the most honest axis.
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: