True-to-Size Millimeter Sizing Comparison

KEEN Newport H2 vs Vans Classic Slip-On

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
Vans Classic Slip-On
5.0(7,523 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Classic Slip-On Breakdown
Fit Verdict

Classic Slip-On Runs Slightly Larger

The Classic Slip-On provides about 4mm more internal length than the Newport H2. We suggest ordering 1/2 size down in Classic Slip-On.

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 Classic Slip-On.

Recommended Size in Vans Classic Slip-On
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 CavityClassic Slip-On 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 Classic Slip-On?

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

Do these shoes fit wide feet comfortably?

The Newport H2 has a standard medium width profile, while the Classic Slip-On is standard medium.