If your your foot length is foot 23.5 cm, go with a US men 5.5 / US women 7. Running shoes should be about a half to a full size larger than your dress shoes — your feet swell on long runs and your toes need room. Size by measured foot length in cm.
| Your foot length | Recommended size |
|---|---|
| foot 22.5 cm | US men 4.5 / US women 6 |
| foot 23.0 cm | US men 5 / US women 6.5 |
| foot 23.5 cm | US men 5.5 / US women 7 |
| foot 24.0 cm | US men 6 / US women 7.5 |
| foot 24.5 cm | US men 6.5 / US women 8 |
| foot 25.5 cm | US men 7.5 / US women 9 |
| foot 26.0 cm | US men 8 / US women 9.5 |
| foot 26.5 cm | US men 8.5 / US women 10 |
| foot 27.0 cm | US men 9 / US women 10.5 |
| foot 27.5 cm | US men 9.5 / US women 11 |
| foot 28.0 cm | US men 10 / US women 11.5 |
| foot 29.0 cm | US men 11 |
| foot 30.0 cm | US men 12 |
| foot 30.5 cm | US men 13 |
| foot 22.0 cm | US men 4 / US women 5.5 |
| foot 31.5 cm | US men 14 |
| Long-distance running | Size up half a size for swelling on long runs. |
| Wide feet | Choose a wide (2E) model rather than a longer shoe. |
| Between sizes | Go up — a thumb of space at the toe prevents black toenails. |