True-to-Size Millimeter Sizing Comparison
Haflinger AT Classic Hardsole vs Haflinger GZ Classic Grizzly
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 AT Classic Hardsole to see your calculated size in the GZ Classic Grizzly.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| AT Classic Hardsole (US) | Internal Cavity | GZ Classic Grizzly Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 3.5 | 239 mm | US 3.5 | 85% | +1.3 mm |
| US 4 | 242 mm | US 4 | 85% | +1.3 mm |
| US 4.5 | 246 mm | US 4.5 | 85% | +1.3 mm |
| US 5 | 249 mm | US 5 | 85% | +1.3 mm |
| US 5.5 | 252 mm | US 5.5 | 85% | +1.3 mm |
| US 6 | 256 mm | US 6 | 85% | +1.3 mm |
| US 6.5 | 259 mm | US 6.5 | 85% | +1.3 mm |
| US 7 | 266 mm | US 7 | 85% | +1.3 mm |
| US 7.5 | 269 mm | US 7.5 | 85% | +1.3 mm |
| US 8 | 272 mm | US 8 | 85% | +1.3 mm |
| US 8.5 | 276 mm | US 8.5 | 85% | +1.3 mm |
| US 9 | 279 mm | US 9 | 85% | +1.3 mm |
| US 9.5 | 282 mm | US 9.5 | 85% | +1.3 mm |
| US 10 | 286 mm | US 10 | 85% | +1.3 mm |
| US 10.5 | 289 mm | US 10.5 | 85% | +1.3 mm |
| US 11 | 292 mm | US 11 | 85% | +1.3 mm |
| US 11.5 | 296 mm | US 11.5 | 85% | +1.3 mm |
| US 12 | 299 mm | US 12 | 85% | +1.3 mm |
| US 12.5 | 302 mm | US 12.5 | 85% | +1.3 mm |
| US 13 | 306 mm | US 13 | 85% | +1.3 mm |
| US 14 | 312 mm | US 14 | 85% | +1.3 mm |
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Frequently Asked Questions
How does the AT Classic Hardsole size compare to the GZ Classic Grizzly?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The AT Classic Hardsole has an internal fit offset of -0.64mm compared to 0.64mm for the GZ Classic Grizzly.
Do these shoes fit wide feet comfortably?
The AT Classic Hardsole has a roomy/wide width profile, while the GZ Classic Grizzly is roomy/wide.