👟 Brand to Brand
Nike to UGG Shoe Size Conversion
Switching from Nike to UGG? Nike runs small and UGG runs large, so the size you order changes. Here's the full chart.
Nike runs 1 size larger than UGG, so you may need to size down when switching.
Size up 1 moving to UGG
UGG runs smaller — order half a size larger than your Nike size.
Find your Nike size on the left, read across for UGG:
| Nike size | UGG size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 5.5 | 5.5 | 37 | 23.5 |
| 6.5 | 5.5 | 5.5 | 37.5 | 23.9 |
| 7 | 6 | 6 | 38 | 24.3 |
| 7.5 | 6.5 | 6.5 | 38.5 | 24.7 |
| 8 | 7 | 7 | 39.5 | 25.1 |
| 8 | 7 | 7 | 40 | 25.5 |
| 8.5 | 7.5 | 7.5 | 41 | 25.9 |
| 9 | 8 | 8 | 41.5 | 26.3 |
| 9.5 | 8.5 | 8.5 | 42.5 | 26.7 |
| 10 | 9 | 9 | 43 | 27.1 |
| 10.5 | 9.5 | 9.5 | 43.5 | 27.5 |
| 11 | 10 | 10 | 44 | 27.9 |
| 11.5 | 10.5 | 10.5 | 44.5 | 28.3 |
| 12 | 11 | 11 | 45.5 | 28.7 |
| 12.5 | 11.5 | 11.5 | 46 | 29.1 |
| 13 | 12 | 12 | 47 | 29.5 |
| 13.5 | 12.5 | 12.5 | 47.5 | 29.9 |
| 14 | 13 | 13 | 48 | 30.3 |
| 14 | 13 | 13 | 48.5 | 30.7 |
| 14.5 | 13.5 | 13.5 | 49 | 31.1 |
| 15 | 14 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Nike tends to run about half a size small — most people size up half, and lifestyle models (Air Force 1, Blazer) run especially snug. UGG runs about half a size large and moulds to the foot — size down half, or a full size for slippers.
UGG to Nike → · Nike chart · UGG chart · Brand finder
What is a Nike 10.5 in UGG?
A Nike 10.5 is about a UGG 9.5 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Nike and UGG fit the same?
Not quite — UGG runs about 1 size smaller than Nike.
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