👟 Brand to Brand
Allbirds to Nike Shoe Size Conversion
Switching from Allbirds to Nike? Allbirds runs true to size and Nike runs small, so the size you order changes. Here's the full chart.
A Allbirds 9 works out to a Nike 9.5 — about half a size up. The chart below has every size.
Allbirds → Nike: size up half a size
A Allbirds 9 is a Nike 9.5.
Find your Allbirds size on the left, read across for Nike:
| Allbirds size | Nike size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 7 | 5.5 | 37 | 23.5 |
| 7 | 7.5 | 6 | 38 | 24.3 |
| 7.5 | 8 | 6.5 | 38.5 | 24.7 |
| 8 | 8.5 | 7 | 39.5 | 25.1 |
| 8.5 | 9 | 7.5 | 41 | 25.9 |
| 9 | 9.5 | 8 | 41.5 | 26.3 |
| 9.5 | 10 | 8.5 | 42.5 | 26.7 |
| 10 | 10.5 | 9 | 43 | 27.1 |
| 10.5 | 11 | 9.5 | 43.5 | 27.5 |
| 11 | 11.5 | 10 | 44 | 27.9 |
| 11.5 | 12 | 10.5 | 44.5 | 28.3 |
| 12 | 12.5 | 11 | 45.5 | 28.7 |
| 12.5 | 13 | 11.5 | 46 | 29.1 |
| 13 | 13.5 | 12 | 47 | 29.5 |
| 13.5 | 14 | 12.5 | 47.5 | 29.9 |
| 14 | 14.5 | 13 | 48 | 30.3 |
| 14.5 | 15 | 13.5 | 49 | 31.1 |
| 15 | 15.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Allbirds runs true to size; half sizes are rounded, so go to the nearest whole. Nike tends to run about half a size small — most people size up half, and lifestyle models (Air Force 1, Blazer) run especially snug.
Nike to Allbirds → · Allbirds chart · Nike chart · Brand finder
What is a Allbirds 9 in Nike?
A Allbirds 9 is about a Nike 9.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do Allbirds and Nike fit the same?
No — Allbirds runs true to size and Nike runs small, so size up half a size when you switch.
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