👟 Brand to Brand
Merrell to UGG Shoe Size Conversion
Switching from Merrell to UGG? Merrell runs true to size and UGG runs large, so the size you order changes. Here's the full chart.
A Merrell 9 works out to a UGG 8.5 — about half a size down. The chart below has every size.
Merrell → UGG: size down half a size
A Merrell 9 is a UGG 8.5.
Find your Merrell size on the left, read across for UGG:
| Merrell size | UGG size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6 | 5.5 | 37 | 23.5 |
| 7 | 6.5 | 6 | 38 | 24.3 |
| 7.5 | 7 | 6.5 | 38.5 | 24.7 |
| 8 | 7.5 | 7 | 39.5 | 25.1 |
| 8.5 | 8 | 7.5 | 41 | 25.9 |
| 9 | 8.5 | 8 | 41.5 | 26.3 |
| 9.5 | 9 | 8.5 | 42.5 | 26.7 |
| 10 | 9.5 | 9 | 43 | 27.1 |
| 10.5 | 10 | 9.5 | 43.5 | 27.5 |
| 11 | 10.5 | 10 | 44 | 27.9 |
| 11.5 | 11 | 10.5 | 44.5 | 28.3 |
| 12 | 11.5 | 11 | 45.5 | 28.7 |
| 12.5 | 12 | 11.5 | 46 | 29.1 |
| 13 | 12.5 | 12 | 47 | 29.5 |
| 13.5 | 13 | 12.5 | 47.5 | 29.9 |
| 14 | 13.5 | 13 | 48 | 30.3 |
| 14.5 | 14 | 13.5 | 49 | 31.1 |
| 15 | 14.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Merrell runs true to size with a roomy toe box; wide options exist. UGG runs about half a size large and moulds to the foot — size down half, or a full size for slippers.
UGG to Merrell → · Merrell chart · UGG chart · Brand finder
What is a Merrell 9 in UGG?
A Merrell 9 is about a UGG 8.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do Merrell and UGG fit the same?
No — Merrell runs true to size and UGG runs large, so size down half a size when you switch.
ⓘ Affiliate links below. As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
Recommended on Amazon
Foot Measuring Device
Measure once, buy any brand with confidence.
View on Amazon →