True-to-Size Millimeter Sizing Comparison
KEEN Utility Flint II (Soft Toe) vs KEEN Utility Vista Energy
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 Flint II (Soft Toe) to see your calculated size in the Vista Energy.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Flint II (Soft Toe) (US) | Internal Cavity | Vista Energy Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 267 mm | US 7.5 | 73% | +2.3 mm |
| US 7.5 | 270 mm | US 8 | 73% | +2.3 mm |
| US 8 | 273 mm | US 8.5 | 61% | +3.3 mm |
| US 8.5 | 277 mm | US 9 | 73% | +2.3 mm |
| US 9 | 280 mm | US 9.5 | 73% | +2.3 mm |
| US 9.5 | 283 mm | US 10 | 61% | +3.3 mm |
| US 10 | 287 mm | US 10.5 | 73% | +2.3 mm |
| US 10.5 | 290 mm | US 11 | 73% | +2.3 mm |
| US 11 | 293 mm | US 11.5 | 61% | +3.3 mm |
| US 11.5 | 297 mm | US 12 | 73% | +2.3 mm |
| US 12 | 300 mm | US 12.5 | 73% | +2.3 mm |
| US 12.5 | 303 mm | US 13 | 61% | +3.3 mm |
| US 13 | 307 mm | US 13 | 91% | -0.7 mm |
| US 14 | 313 mm | US 14 | 91% | -0.7 mm |
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Frequently Asked Questions
How does the Flint II (Soft Toe) size compare to the Vista Energy?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Flint II (Soft Toe) has an internal fit offset of 0.24mm compared to -0.48mm for the Vista Energy.
Do these shoes fit wide feet comfortably?
The Flint II (Soft Toe) has a roomy/wide width profile, while the Vista Energy is snug/narrow.