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Allbirds to adidas Shoe Size Conversion
Switching from Allbirds to adidas? Allbirds runs true to size and adidas runs small, so the size you order changes. Here's the full chart.
adidas runs 0.5 size larger than Allbirds, so you may need to size down when switching.
Size down 0.5 moving to adidas
adidas runs larger — order half a size smaller than your Allbirds size.
Find your Allbirds size on the left, read across for adidas:
| Allbirds size | adidas 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. adidas generally runs about half a size small, particularly lifestyle and Ultraboost models; Sambas and Gazelles run long and narrow.
adidas to Allbirds → · Allbirds chart · adidas chart · Brand finder
What is a Allbirds 10.5 in adidas?
A Allbirds 10.5 is about a adidas 11 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Allbirds and adidas fit the same?
Not quite — adidas runs about 0.5 size larger than Allbirds.
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