Match sizes by foot length (cm), then check model fit — US labels alone can mislead across brands.
Chart match · verify brand charts(paid link)
Full converter (model + shoes you own) · Reverse: Sorel → Clarks
Static conversion table (crawlable). Interactive tool above uses the same cm matching.
| Clarks US | cm | Sorel US | Sorel EU |
|---|---|---|---|
| 6.0 | 23.6 | 6.0 | 38.5 |
| 6.5 | 24.1 | 6.5 | 39.0 |
| 7.0 | 24.6 | 7.0 | 40.0 |
| 7.5 | 25.1 | 7.5 | 40.5 |
| 8.0 | 25.4 | 7.5 | 40.5 |
| 8.5 | 25.9 | 8.5 | 42.0 |
| 9.0 | 26.2 | 8.5 | 42.0 |
| 9.5 | 26.8 | 9.5 | 43.0 |
| 10.0 | 27.2 | 10.0 | 44.0 |
| 10.5 | 27.6 | 10.5 | 44.5 |
| 11.0 | 27.9 | 10.5 | 44.5 |
| 11.5 | 28.4 | 11.5 | 45.5 |
| 12.0 | 28.9 | 12.0 | 46.0 |
| 13.0 | 29.8 | 13.0 | 47.5 |
Clarks US 10 is 27.2 cm; Sorel’s nearest US is 10 (EU 44). US 10.5 is 27.6 cm → Sorel 10.5 (EU 44.5). The printed US ladder is 1:1. Wallabee and Desert Boot are crepe/chukka lasts with their own length quirks; Caribou is an insulated winter boot. Same centimeter, totally different sock and liner volume.
If you wear Wallabee TTS (or a half down, depending on the pair), do not copy that number into Caribou and then size up again “for socks.” The winter-boot guide on this site is about liner bulk; this chart is only foot length. Start at Sorel US 10 from a Clarks 10 / 27.2 cm foot, then add volume with the sock you will actually wear — one decision, not two stacked halves.
Desert Boot and Wallabee do not share a last with each other either. Convert from the cm column, then open the specific Clarks guide you own. A half size here is 27.2 → 27.6 cm (~4 mm). That half will not turn a chukka into a Caribou; it only changes labeled length.
Even when charts match, lasts differ. Check these guides:
Clarks: Wallabee · Desert Boot
Sorel: Caribou
Also compare Clarks to: Blundstone
Check prices: Clarks Sorel (paid link)
Clothes sizing uses a separate compare path.