UGG Shoe Size Chart
What's my UGG size?
UGG Men's Size Chart
| US | EU | UK | JP / CM |
|---|---|---|---|
| 4 | 36 | 3 | 22 |
| 4.5 | 36.5 | 3.5 | 22.5 |
| 5 | 37 | 4 | 23 |
| 5.5 | 37.5 | 4.5 | 23.5 |
| 6 | 38 | 5 | 24 |
| 6.5 | 38.5 | 5.5 | 24.5 |
| 7 | 39.5 | 6 | 25 |
| 7.5 | 40 | 6.5 | 25.5 |
| 8 | 40.5 | 7 | 26 |
| 8.5 | 41 | 7.5 | 26.5 |
| 9 | 42 | 8 | 27 |
| 9.5 | 42.5 | 8.5 | 27.5 |
| 10 | 43 | 9 | 28 |
| 10.5 | 43.5 | 9.5 | 28.5 |
| 11 | 44 | 10 | 29 |
UGG Women's Size Chart
| US | EU | UK | JP / CM |
|---|---|---|---|
| 5 | 36 | 3 | 22 |
| 5.5 | 36.5 | 3.5 | 22.5 |
| 6 | 37 | 4 | 23 |
| 6.5 | 37.5 | 4.5 | 23.5 |
| 7 | 38 | 5 | 24 |
| 7.5 | 38.5 | 5.5 | 24.5 |
| 8 | 39.5 | 6 | 25 |
| 8.5 | 40 | 6.5 | 25.5 |
| 9 | 40.5 | 7 | 26 |
| 9.5 | 41 | 7.5 | 26.5 |
| 10 | 42 | 8 | 27 |
| 10.5 | 42.5 | 8.5 | 27.5 |
| 11 | 43 | 9 | 28 |
| 11.5 | 43.5 | 9.5 | 28.5 |
| 12 | 44 | 10 | 29 |
Data verified Jun 2026 · Official size guide · See an error? Report it
Do UGGs run big, and should I size down?
Yes — UGG Classic boots run large and the sheepskin stretches with wear, so UGG recommends sizing down. If you're between sizes go a half size down; for whole-size-only Classic styles, drop to the nearest whole size. A US women's 8 is UK 6 and EU 39.5.
- Fit
- Runs large — size down
- Classic styles
- Whole sizes only
- US W 8 =
- UK 6 · EU 39.5
- CM
- 25
UGG Sizing & Fit Guide
UGG Classic sheepskin boots run large and stretch with wear, so UGG recommends sizing down — a half size down if you're between sizes, or down to the nearest whole size for whole-size-only Classic styles. UGG uses unified US sizing where the women's number is one above the men's.
Frequently Asked Questions
UGG Classic sheepskin boots run large and stretch with wear, so UGG recommends sizing down — a half size down if you're between sizes, or down to the nearest whole size for whole-size-only Classic styles. UGG uses unified US sizing where the women's number is one above the men's.
Enter your foot length in the finder at the top of this page — or, if you don't have a ruler, pick a brand you already know and your size in it — and we'll instantly highlight your equivalent UGG size in the men's and women's charts below. To compare your size across many brands at once, use our shoe size converter.
UGG EU 42 is approximately a US men's 8.5-9. However, exact conversions vary slightly. Use our size chart table above for the precise conversion, or try our interactive converter for personalized results.