Brand Size Comparison
Pick the brand and size you already wear. We look up the foot length that size is built for and find the matching size in the other brands.
Men's sizes compared by foot length
Each row is a foot length. The cells show the smallest US size in each brand that fits it.
| Foot (cm) | Nike | Adidas | New Balance | Asics |
|---|---|---|---|---|
| 23 | 6 | 4.5 | 6 | 6 |
| 23.5 | 6 | 5 | 6 | 6 |
| 24 | 6 | 5.5 | 6 | 6 |
| 24.5 | 6.5 | 6 | 6.5 | 6.5 |
| 25 | 7 | 7 | 7 | 7 |
| 25.5 | 7.5 | 7.5 | 7.5 | 7.5 |
| 26 | 8 | 8 | 8 | 8 |
| 26.5 | 8.5 | 8.5 | 8.5 | 8.5 |
| 27 | 9 | 9.5 | 9 | 9 |
| 27.5 | 9.5 | 10 | 9.5 | 9.5 |
| 28 | 10 | 10.5 | 10 | 10 |
| 28.5 | 10.5 | 11 | 10.5 | 10.5 |
| 28.75 | 11 | 11.5 | 11 | 11 |
| 29 | 11 | 11.5 | 11 | 11.5 |
| 29.5 | 11.5 | 12.5 | 11.5 | 12 |
| 30 | 12 | 13 | 12 | 12.5 |
| 30.5 | 12.5 | 13.5 | 13 | 13 |
| 31 | 13 | 14 | 13 | 14 |
| 32 | 14 | — | 14 | — |
| 33 | 15 | — | — | — |
Women's sizes compared by foot length
| Foot (cm) | Nike | Adidas | New Balance | Asics |
|---|---|---|---|---|
| 22 | 5 | 5 | 5 | 5 |
| 22.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| 23 | 6 | 6 | 6 | 6 |
| 23.5 | 6.5 | 6.5 | 6.5 | 6.5 |
| 24 | 7 | 7 | 7 | 7 |
| 24.5 | 7.5 | 7.5 | 7.5 | 7.5 |
| 25 | 8 | 8 | 8 | 8 |
| 25.5 | 8.5 | 8.5 | 8.5 | 8.5 |
| 25.75 | 9 | 9 | 9 | 9 |
| 26 | 9 | 9 | 9 | 9.5 |
| 26.5 | 9.5 | 9.5 | 9.5 | 10 |
| 27 | 10 | 10.5 | 10 | 10.5 |
| 27.5 | 10.5 | 11 | 10.5 | 11 |
| 28 | 11 | 12 | 11 | 12 |
| 28.5 | 12 | 12 | 12 | 12 |
| 29 | 12 | — | 12 | — |
Frequently asked questions
Is Nike sizing the same as Adidas?
Close, but not identical. Adidas labels a slightly shorter foot length for the same US number at several sizes, so a few Nike wearers end up half a size up in Adidas. Model shape matters more than the label: a Samba fits differently from an Ultraboost.
Do New Balance and Asics fit like Nike?
On paper, the foot lengths line up almost one for one with Nike at most US sizes. In practice New Balance tends to feel roomier and offers real width options, while many Asics running shoes feel snug through the midfoot.
Should I trust a brand comparison over trying shoes on?
Use it to pick the right starting size when ordering online. Trying on is still the gold standard, and the model guides on this site flag the shoes that run small or large compared to their brand chart.