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Allbirds to UGG Shoe Size Conversion
Switching from Allbirds to UGG? Allbirds runs true to size and UGG runs large, so the size you order changes. Here's the full chart.
Allbirds runs 0.5 size larger than UGG, so you may need to size down when switching.
Size up 0.5 moving to UGG
UGG runs smaller — order half a size larger than your Allbirds size.
Find your Allbirds size on the left, read across for UGG:
| Allbirds size | UGG size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6 | 5.5 | 37 | 23.5 |
| 6.5 | 6 | 5.5 | 37.5 | 23.9 |
| 7 | 6.5 | 6 | 38 | 24.3 |
| 7.5 | 7 | 6.5 | 38.5 | 24.7 |
| 8 | 7.5 | 7 | 39.5 | 25.1 |
| 8 | 7.5 | 7 | 40 | 25.5 |
| 8.5 | 8 | 7.5 | 41 | 25.9 |
| 9 | 8.5 | 8 | 41.5 | 26.3 |
| 9.5 | 9 | 8.5 | 42.5 | 26.7 |
| 10 | 9.5 | 9 | 43 | 27.1 |
| 10.5 | 10 | 9.5 | 43.5 | 27.5 |
| 11 | 10.5 | 10 | 44 | 27.9 |
| 11.5 | 11 | 10.5 | 44.5 | 28.3 |
| 12 | 11.5 | 11 | 45.5 | 28.7 |
| 12.5 | 12 | 11.5 | 46 | 29.1 |
| 13 | 12.5 | 12 | 47 | 29.5 |
| 13.5 | 13 | 12.5 | 47.5 | 29.9 |
| 14 | 13.5 | 13 | 48 | 30.3 |
| 14 | 13.5 | 13 | 48.5 | 30.7 |
| 14.5 | 14 | 13.5 | 49 | 31.1 |
| 15 | 14.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Allbirds runs true to size; half sizes are rounded, so go to the nearest whole. UGG runs about half a size large and moulds to the foot — size down half, or a full size for slippers.
UGG to Allbirds → · Allbirds chart · UGG chart · Brand finder
What is a Allbirds 10.5 in UGG?
A Allbirds 10.5 is about a UGG 10 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Allbirds and UGG fit the same?
Not quite — UGG runs about 0.5 size smaller than Allbirds.
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