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UGG to Allbirds Shoe Size Conversion
Switching from UGG to Allbirds? UGG runs large and Allbirds runs true to size, 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 down 0.5 moving to Allbirds
Allbirds runs larger — order half a size smaller than your UGG size.
Find your UGG size on the left, read across for Allbirds:
| UGG size | Allbirds 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. UGG runs about half a size large and moulds to the foot — size down half, or a full size for slippers. Allbirds runs true to size; half sizes are rounded, so go to the nearest whole.
Allbirds to UGG → · UGG chart · Allbirds chart · Brand finder
What is a UGG 10.5 in Allbirds?
A UGG 10.5 is about a Allbirds 11 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do UGG and Allbirds fit the same?
Not quite — Allbirds runs about 0.5 size larger than UGG.
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