True-to-Size Millimeter Sizing Comparison

Adidas Stan Smith vs KEEN Newport H2

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

Shoe Aunisex
Adidas Stan Smith
4.7(70,489 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Stan Smith Breakdown
Shoe Bmen
KEEN Newport H2
5.0(3,249 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Newport H2 Breakdown
Fit Verdict

True to Size Comparison

Both shoes share a very similar length profile. We recommend ordering your standard size in both.

Length Delta-0.72 mm
Width Delta+0.03 mm

Interactive Size Converter

Select what size you wear in the Stan Smith to see your calculated size in the Newport H2.

Recommended Size in KEEN Newport H2
US 11.597% Match

Internal shoe cavity difference: +0.3 mm (slightly roomier)

Complete Size Conversion Matrix

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

Stan Smith (US)Internal CavityNewport H2 EquivalentMatch AccuracyFit Difference
US 4237 mmUS 70%+29.3 mm
US 4.5241 mmUS 70%+25.3 mm
US 5245 mmUS 70%+21.3 mm
US 5.5249 mmUS 70%+17.3 mm
US 6254 mmUS 70%+12.3 mm
US 6.5258 mmUS 72%+8.3 mm
US 7262 mmUS 749%+4.3 mm
US 7.5266 mmUS 797%+0.3 mm
US 8271 mmUS 885%+1.3 mm
US 8.5275 mmUS 8.585%+1.3 mm
US 9279 mmUS 997%+0.3 mm
US 9.5283 mmUS 9.591%-0.7 mm
US 10287 mmUS 1091%-0.7 mm
US 10.5292 mmUS 1197%+0.3 mm
US 11296 mmUS 11.597%+0.3 mm
US 11.5300 mmUS 1291%-0.7 mm
US 12304 mmUS 12.580%-1.7 mm
US 12.5309 mmUS 1368%-2.7 mm
US 13313 mmUS 1491%-0.7 mm
US 13.5317 mmUS 1444%-4.7 mm
US 14321 mmUS 140%-8.7 mm
US 14.5326 mmUS 140%-13.7 mm
US 15330 mmUS 140%-17.7 mm
US 16334 mmUS 140%-21.7 mm
US 17342 mmUS 140%-29.7 mm
US 18351 mmUS 140%-38.7 mm
US 19359 mmUS 140%-46.7 mm
US 20368 mmUS 140%-55.7 mm

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Frequently Asked Questions

How does the Stan Smith size compare to the Newport H2?

Both shoes share a very similar length profile. We recommend ordering your standard size in both. The Stan Smith has an internal fit offset of 0.12mm compared to -0.6mm for the Newport H2.

Do these shoes fit wide feet comfortably?

The Stan Smith has a snug/narrow width profile, while the Newport H2 is standard medium.