👟 Brand to Brand
UGG to Nike Shoe Size Conversion
Switching from UGG to Nike? UGG runs large and Nike runs small, 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 down 1 moving to Nike
Nike runs larger — order half a size smaller than your UGG size.
Find your UGG size on the left, read across for Nike:
| UGG size | Nike size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 7.5 | 5.5 | 37 | 23.5 |
| 6.5 | 7.5 | 5.5 | 37.5 | 23.9 |
| 7 | 8 | 6 | 38 | 24.3 |
| 7.5 | 8.5 | 6.5 | 38.5 | 24.7 |
| 8 | 9 | 7 | 39.5 | 25.1 |
| 8 | 9 | 7 | 40 | 25.5 |
| 8.5 | 9.5 | 7.5 | 41 | 25.9 |
| 9 | 10 | 8 | 41.5 | 26.3 |
| 9.5 | 10.5 | 8.5 | 42.5 | 26.7 |
| 10 | 11 | 9 | 43 | 27.1 |
| 10.5 | 11.5 | 9.5 | 43.5 | 27.5 |
| 11 | 12 | 10 | 44 | 27.9 |
| 11.5 | 12.5 | 10.5 | 44.5 | 28.3 |
| 12 | 13 | 11 | 45.5 | 28.7 |
| 12.5 | 13.5 | 11.5 | 46 | 29.1 |
| 13 | 14 | 12 | 47 | 29.5 |
| 13.5 | 14.5 | 12.5 | 47.5 | 29.9 |
| 14 | 15 | 13 | 48 | 30.3 |
| 14 | 15 | 13 | 48.5 | 30.7 |
| 14.5 | 15.5 | 13.5 | 49 | 31.1 |
| 15 | 16 | 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. Nike tends to run about half a size small — most people size up half, and lifestyle models (Air Force 1, Blazer) run especially snug.
Nike to UGG → · UGG chart · Nike chart · Brand finder
What is a UGG 10.5 in Nike?
A UGG 10.5 is about a Nike 11.5 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do UGG and Nike fit the same?
Not quite — Nike runs about 1 size larger than UGG.
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