P400
Fit verdict, size conversion guide, and millimeter measurements.
This shoe runs approximately 3mm shorter than standard sizing. If you are between sizes or prefer a relaxed fit, go a half size up.
Aggregated feedback from verified shoe owners
| EU | US (M) | UK | Foot Length | Cavity Length |
|---|---|---|---|---|
| 34 | 2.5 | 2 | 20.5 cm | 218 mm |
| 35 | 3 | 2.5 | 21.0 cm | 223 mm |
| 35.5 | 3.5 | 3 | 21.5 cm | 228 mm |
| 36 | 4 | 3.5 | 22.0 cm | 233 mm |
| 37 | 4.5 | 4 | 22.5 cm | 238 mm |
| 37.5 | 5 | 4.5 | 23.0 cm | 243 mm |
| 38 | 5.5 | 5 | 23.5 cm | 248 mm |
| 38.5 | 6 | 5.5 | 24.0 cm | 253 mm |
| 39.5 | 6.5 | 6 | 24.5 cm | 258 mm |
| 40 | 7 | 6.5 | 25.0 cm | 263 mm |
| 40.5 | 7.5 | 7 | 25.5 cm | 268 mm |
| 41.5 | 8 | 7.5 | 26.0 cm | 273 mm |
| 42 | 8.5 | 8 | 26.5 cm | 278 mm |
| 42.5 | 9 | 8.5 | 27.0 cm | 283 mm |
| 43 | 9.5 | 9 | 27.5 cm | 288 mm |
| 44 | 10 | 9.5 | 28.0 cm | 293 mm |
| 44.5 | 10.5 | 10 | 28.5 cm | 298 mm |
| 45 | 11 | 10.5 | 29.0 cm | 303 mm |
| 45.5 | 11.5 | 11 | 29.5 cm | 308 mm |
| 46.5 | 12 | 11.5 | 30.0 cm | 313 mm |
| 47 | 12.5 | 12 | 30.5 cm | 318 mm |
| 47.5 | 13 | 12.5 | 31.0 cm | 323 mm |
| 48.5 | 13.5 | 13 | 31.5 cm | 328 mm |
| 49 | 14 | 13.5 | 32.0 cm | 333 mm |
| 50 | 15 | 14.5 | 33.0 cm | 343 mm |
| 51 | 16 | 15.5 | 34.0 cm | 353 mm |
| 52 | 17 | 16.5 | 35.0 cm | 363 mm |
| 53 | 18 | 17.5 | 36.0 cm | 373 mm |
| 54 | 19 | 18.5 | 37.0 cm | 383 mm |
| 55 | 20 | 19.5 | 38.0 cm | 393 mm |
Does the New Balance P400 run big or small?
It tends to run slightly small. We recommend going a half size up for the best fit. This shoe runs approximately 3mm shorter than standard sizing. If you are between sizes or prefer a relaxed fit, go a half size up.
How does Shoe Fit determine shoe sizing?
Shoe Fit calculates the real-world interior shoe cavity in millimeters combined with real owner feedback, rather than relying on arbitrary brand charts.
Already own a shoe that fits well? Shoe Fit cross-references its internal cavity against the New Balance P400 to give you your personalized size.
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