👟 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.
A UGG 8.5 works out to a Nike 9.5 — about a full size up. The chart below has every size.
UGG → Nike: size up a full size
A UGG 8.5 is a Nike 9.5.
Find your UGG size on the left, read across for Nike:
| UGG size | Nike size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6 | 7 | 5.5 | 37 | 23.5 |
| 6.5 | 7.5 | 6 | 38 | 24.3 |
| 7 | 8 | 6.5 | 38.5 | 24.7 |
| 7.5 | 8.5 | 7 | 39.5 | 25.1 |
| 8 | 9 | 7.5 | 41 | 25.9 |
| 8.5 | 9.5 | 8 | 41.5 | 26.3 |
| 9 | 10 | 8.5 | 42.5 | 26.7 |
| 9.5 | 10.5 | 9 | 43 | 27.1 |
| 10 | 11 | 9.5 | 43.5 | 27.5 |
| 10.5 | 11.5 | 10 | 44 | 27.9 |
| 11 | 12 | 10.5 | 44.5 | 28.3 |
| 11.5 | 12.5 | 11 | 45.5 | 28.7 |
| 12 | 13 | 11.5 | 46 | 29.1 |
| 12.5 | 13.5 | 12 | 47 | 29.5 |
| 13 | 14 | 12.5 | 47.5 | 29.9 |
| 13.5 | 14.5 | 13 | 48 | 30.3 |
| 14 | 15 | 13.5 | 49 | 31.1 |
| 14.5 | 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. 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 8.5 in Nike?
A UGG 8.5 is about a Nike 9.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do UGG and Nike fit the same?
No — UGG runs large and Nike runs small, so size up a full size when you switch.
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