True-to-Size Millimeter Sizing Comparison

KEEN Newport H2 vs Nike Air Max Tuned 1

Detailed size conversion chart, cavity measurements in millimeters, and crowd-sourced fit advice for choosing your perfect size.

Shoe Amen
KEEN Newport H2
5.0(3,249 reviews)
Fit TendencyRuns Small (-4mm)
Width ProfileStandard (Medium)
View Full Newport H2 Breakdown
Shoe Bmen
Nike Air Max Tuned 1
4.4(5,664 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Air Max Tuned 1 Breakdown
Fit Verdict

Air Max Tuned 1 Runs Slightly Larger

The Air Max Tuned 1 provides about 4mm more internal length than the Newport H2. We suggest ordering 1/2 size down in Air Max Tuned 1.

Length Delta+4 mm
Width DeltaIdentical

Interactive Size Converter

Select what size you wear in the Newport H2 to see your calculated size in the Air Max Tuned 1.

Recommended Size in Nike Air Max Tuned 1
US 1088% Match

Internal shoe cavity difference: +1.0 mm (slightly roomier)

Alternate option if between sizes: US 9.5 (65% match)

Complete Size Conversion Matrix

Direct millimeter-calibrated mapping comparing all available sizes between both shoes.

Newport H2 (US)Internal CavityAir Max Tuned 1 EquivalentMatch AccuracyFit Difference
US 7263 mmUS 753%+4.0 mm
US 7.5266 mmUS 788%+1.0 mm
US 8269 mmUS 7.588%+1.0 mm
US 8.5273 mmUS 8100%0.0 mm
US 9276 mmUS 8.588%+1.0 mm
US 9.5279 mmUS 988%+1.0 mm
US 10283 mmUS 9.5100%0.0 mm
US 10.5286 mmUS 1088%+1.0 mm
US 11289 mmUS 10.588%+1.0 mm
US 11.5293 mmUS 11100%0.0 mm
US 12296 mmUS 11.588%+1.0 mm
US 12.5299 mmUS 1288%+1.0 mm
US 13303 mmUS 12.5100%0.0 mm
US 14309 mmUS 1376%-2.0 mm

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Frequently Asked Questions

How does the Newport H2 size compare to the Air Max Tuned 1?

The Air Max Tuned 1 provides about 4mm more internal length than the Newport H2. We suggest ordering 1/2 size down in Air Max Tuned 1. The Newport H2 has an internal fit offset of -4mm compared to 0mm for the Air Max Tuned 1.

Do these shoes fit wide feet comfortably?

The Newport H2 has a standard medium width profile, while the Air Max Tuned 1 is standard medium.