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Under Armour to Nike Shoe Size Conversion
Switching from Under Armour to Nike? Under Armour runs small and Nike runs small, so the size you order changes. Here's the full chart.
Because Under Armour and Nike share the same fit tendency, your size carries straight across: a Under Armour 9.5 is a Nike 9.5.
Under Armour and Nike run the same
Order the same number — a Under Armour 9.5 is a Nike 9.5.
Find your Under Armour size on the left, read across for Nike:
| Under Armour size | Nike size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 7 | 7 | 5.5 | 37 | 23.5 |
| 7.5 | 7.5 | 6 | 38 | 24.3 |
| 8 | 8 | 6.5 | 38.5 | 24.7 |
| 8.5 | 8.5 | 7 | 39.5 | 25.1 |
| 9 | 9 | 7.5 | 41 | 25.9 |
| 9.5 | 9.5 | 8 | 41.5 | 26.3 |
| 10 | 10 | 8.5 | 42.5 | 26.7 |
| 10.5 | 10.5 | 9 | 43 | 27.1 |
| 11 | 11 | 9.5 | 43.5 | 27.5 |
| 11.5 | 11.5 | 10 | 44 | 27.9 |
| 12 | 12 | 10.5 | 44.5 | 28.3 |
| 12.5 | 12.5 | 11 | 45.5 | 28.7 |
| 13 | 13 | 11.5 | 46 | 29.1 |
| 13.5 | 13.5 | 12 | 47 | 29.5 |
| 14 | 14 | 12.5 | 47.5 | 29.9 |
| 14.5 | 14.5 | 13 | 48 | 30.3 |
| 15 | 15 | 13.5 | 49 | 31.1 |
| 15.5 | 15.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Under Armour tends to run about half a size small, especially in performance trainers. 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 Under Armour → · Under Armour chart · Nike chart · Brand finder
What is a Under Armour 9.5 in Nike?
A Under Armour 9.5 is about a Nike 9.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do Under Armour and Nike fit the same?
Roughly, yes — both run small, so the same number fits.
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