True-to-Size Millimeter Sizing Comparison
KEEN Newport H2 vs Nike Air Max Plus
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 Newport H2 to see your calculated size in the Air Max Plus.
Complete Size Conversion Matrix
Direct millimeter-calibrated mapping comparing all available sizes between both shoes.
| Newport H2 (US) | Internal Cavity | Air Max Plus Equivalent | Match Accuracy | Fit Difference |
|---|---|---|---|---|
| US 7 | 266 mm | US 7.5 | 97% | -0.3 mm |
| US 7.5 | 269 mm | US 8 | 91% | +0.7 mm |
| US 8 | 272 mm | US 8.5 | 80% | +1.7 mm |
| US 8.5 | 276 mm | US 9 | 80% | +1.7 mm |
| US 9 | 279 mm | US 9 | 85% | -1.3 mm |
| US 9.5 | 282 mm | US 9.5 | 91% | +0.7 mm |
| US 10 | 286 mm | US 10 | 91% | +0.7 mm |
| US 10.5 | 289 mm | US 10.5 | 80% | +1.7 mm |
| US 11 | 292 mm | US 10.5 | 85% | -1.3 mm |
| US 11.5 | 296 mm | US 11 | 85% | -1.3 mm |
| US 12 | 299 mm | US 11.5 | 97% | -0.3 mm |
| US 12.5 | 302 mm | US 12 | 80% | +1.7 mm |
| US 13 | 306 mm | US 12.5 | 80% | +1.7 mm |
| US 14 | 312 mm | US 13 | 97% | -0.3 mm |
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Frequently Asked Questions
How does the Newport H2 size compare to the Air Max Plus?
Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Newport H2 has an internal fit offset of -0.6mm compared to 0.12mm for the Air Max Plus.
Do these shoes fit wide feet comfortably?
The Newport H2 has a standard medium width profile, while the Air Max Plus is roomy/wide.