👟 Brand to Brand
Under Armour to UGG Shoe Size Conversion
Switching from Under Armour to UGG? Under Armour runs small and UGG runs large, so the size you order changes. Here's the full chart.
Under Armour 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 Under Armour size.
Find your Under Armour size on the left, read across for UGG:
| Under Armour 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. Under Armour tends to run about half a size small, especially in performance trainers. UGG runs about half a size large and moulds to the foot — size down half, or a full size for slippers.
UGG to Under Armour → · Under Armour chart · UGG chart · Brand finder
What is a Under Armour 10.5 in UGG?
A Under Armour 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 Under Armour and UGG fit the same?
Not quite — UGG runs about 1 size smaller than Under Armour.
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