True-to-Size Millimeter Sizing Comparison
Dunham Captain vs Dunham Cloud Waterproof
Detailed size conversion chart, cavity measurements in millimeters, and crowd-sourced fit advice for choosing your perfect size.
Interactive Size Converter
Select what size you wear in the Captain to see your calculated size in the Cloud Waterproof.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Captain (US) | Internal Cavity | Cloud Waterproof Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 267 mm | US 7.5 | 70% | +2.6 mm |
| US 7.5 | 270 mm | US 8 | 70% | +2.6 mm |
| US 8 | 273 mm | US 8 | 95% | -0.4 mm |
| US 8.5 | 277 mm | US 9 | 70% | +2.6 mm |
| US 9 | 280 mm | US 9.5 | 70% | +2.6 mm |
| US 9.5 | 283 mm | US 9.5 | 95% | -0.4 mm |
| US 10 | 287 mm | US 10.5 | 70% | +2.6 mm |
| US 10.5 | 290 mm | US 11 | 70% | +2.6 mm |
| US 11 | 293 mm | US 11 | 95% | -0.4 mm |
| US 11.5 | 297 mm | US 12 | 70% | +2.6 mm |
| US 12 | 300 mm | US 12.5 | 70% | +2.6 mm |
| US 12.5 | 303 mm | US 12.5 | 95% | -0.4 mm |
| US 13 | 307 mm | US 13 | 95% | -0.4 mm |
| US 14 | 313 mm | US 14 | 95% | -0.4 mm |
Related Comparisons
dunham ComparisonCaptain vs Windsor WaterproofView Sizing Comparisondunham ComparisonCaptain vs Cloud Plus Waterproof Lace-UpView Sizing Comparisondunham ComparisonCloud Waterproof vs Windsor WaterproofView Sizing Comparisondunham ComparisonCloud Plus Waterproof Lace-Up vs Cloud WaterproofView Sizing Comparison
Frequently Asked Questions
How does the Captain size compare to the Cloud Waterproof?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Captain has an internal fit offset of 0.12mm compared to -0.32mm for the Cloud Waterproof.
Do these shoes fit wide feet comfortably?
The Captain has a snug/narrow width profile, while the Cloud Waterproof is snug/narrow.