👟 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.
Nike runs 0.5 size larger than Allbirds, so you may need to size down when switching.
Size down 0.5 moving to Nike
Nike runs larger — order half a size smaller than your Allbirds size.
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 |
| 6.5 | 7 | 5.5 | 37.5 | 23.9 |
| 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 | 8.5 | 7 | 40 | 25.5 |
| 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 | 14.5 | 13 | 48.5 | 30.7 |
| 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 10.5 in Nike?
A Allbirds 10.5 is about a Nike 11 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Allbirds and Nike fit the same?
Not quite — Nike runs about 0.5 size larger than Allbirds.
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