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UGG to ASICS Shoe Size Conversion
Switching from UGG to ASICS? UGG runs large and ASICS runs true to size, so the size you order changes. Here's the full chart.
ASICS runs 0.5 size larger than UGG, so you may need to size down when switching.
Size down 0.5 moving to ASICS
ASICS runs larger — order half a size smaller than your UGG size.
Find your UGG size on the left, read across for ASICS:
| UGG size | ASICS size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 7 | 5.5 | 37 | 23.5 |
| 6.5 | 7 | 5.5 | 37.5 | 23.9 |
| 7 | 7.5 | 6 | 38 | 24.3 |
| 7.5 | 8 | 6.5 | 38.5 | 24.7 |
| 8 | 8.5 | 7 | 39.5 | 25.1 |
| 8 | 8.5 | 7 | 40 | 25.5 |
| 8.5 | 9 | 7.5 | 41 | 25.9 |
| 9 | 9.5 | 8 | 41.5 | 26.3 |
| 9.5 | 10 | 8.5 | 42.5 | 26.7 |
| 10 | 10.5 | 9 | 43 | 27.1 |
| 10.5 | 11 | 9.5 | 43.5 | 27.5 |
| 11 | 11.5 | 10 | 44 | 27.9 |
| 11.5 | 12 | 10.5 | 44.5 | 28.3 |
| 12 | 12.5 | 11 | 45.5 | 28.7 |
| 12.5 | 13 | 11.5 | 46 | 29.1 |
| 13 | 13.5 | 12 | 47 | 29.5 |
| 13.5 | 14 | 12.5 | 47.5 | 29.9 |
| 14 | 14.5 | 13 | 48 | 30.3 |
| 14 | 14.5 | 13 | 48.5 | 30.7 |
| 14.5 | 15 | 13.5 | 49 | 31.1 |
| 15 | 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. ASICS runs true to size with a roomy toe box; wide fittings are widely available.
ASICS to UGG → · UGG chart · ASICS chart · Brand finder
What is a UGG 10.5 in ASICS?
A UGG 10.5 is about a ASICS 11 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do UGG and ASICS fit the same?
Not quite — ASICS runs about 0.5 size larger than UGG.
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