👟 Brand to Brand
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.
A Allbirds 9 works out to a UGG 8.5 — about half a size down. The chart below has every size.
Allbirds → UGG: size down half a size
A Allbirds 9 is a UGG 8.5.
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 |
| 7 | 6.5 | 6 | 38 | 24.3 |
| 7.5 | 7 | 6.5 | 38.5 | 24.7 |
| 8 | 7.5 | 7 | 39.5 | 25.1 |
| 8.5 | 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 |
| 14.5 | 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 9 in UGG?
A Allbirds 9 is about a UGG 8.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do Allbirds and UGG fit the same?
No — Allbirds runs true to size and UGG runs large, so size down half a size when you switch.
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