True-to-Size Millimeter Sizing Comparison

Allbirds Tree Breezer vs KEEN Newport H2

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

Shoe Aunisex
Allbirds Tree Breezer
4.5(3,717 reviews)
Fit TendencyTrue to Size
Width ProfileStandard (Medium)
View Full Tree Breezer Breakdown
Shoe Bmen
KEEN Newport H2
5.0(3,249 reviews)
Fit TendencyRuns Small (-4mm)
Width ProfileStandard (Medium)
View Full Newport H2 Breakdown
Fit Verdict

Newport H2 Runs Slightly Smaller

The Newport H2 is about 4mm shorter than the Tree Breezer. We suggest ordering 1/2 size up in Newport H2.

Length Delta-4 mm
Width DeltaIdentical

Interactive Size Converter

Select what size you wear in the Tree Breezer to see your calculated size in the Newport H2.

Recommended Size in KEEN Newport H2
US 988% Match

Internal shoe cavity difference: -1.0 mm (snugger)

Alternate option if between sizes: US 9.5 (76% match)

Complete Size Conversion Matrix

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

Tree Breezer (US)Internal CavityNewport H2 EquivalentMatch AccuracyFit Difference
US 3.5240 mmUS 70%+23.0 mm
US 4243 mmUS 70%+20.0 mm
US 4.5247 mmUS 70%+16.0 mm
US 5250 mmUS 70%+13.0 mm
US 5.5253 mmUS 70%+10.0 mm
US 6257 mmUS 729%+6.0 mm
US 6.5260 mmUS 765%+3.0 mm
US 7267 mmUS 7.588%-1.0 mm
US 7.5270 mmUS 888%-1.0 mm
US 8273 mmUS 8.5100%0.0 mm
US 8.5277 mmUS 988%-1.0 mm
US 9280 mmUS 9.588%-1.0 mm
US 9.5283 mmUS 10100%0.0 mm
US 10287 mmUS 10.588%-1.0 mm
US 10.5290 mmUS 1188%-1.0 mm
US 11293 mmUS 11.5100%0.0 mm
US 11.5297 mmUS 1288%-1.0 mm
US 12300 mmUS 12.588%-1.0 mm
US 12.5303 mmUS 13100%0.0 mm
US 13307 mmUS 1476%+2.0 mm
US 14313 mmUS 1453%-4.0 mm

Related Comparisons

Direct RivalryStan Smith vs Tree BreezerView Sizing ComparisonDirect RivalryGazelle vs Tree BreezerView Sizing ComparisonDirect RivalryTree Breezer vs Daybreak Scuff Motif 2View Sizing ComparisonDirect RivalryTree Breezer vs Classic Slip-OnView Sizing ComparisonDirect RivalryStan Smith vs Newport H2View Sizing ComparisonDirect RivalryGazelle vs Newport H2View Sizing Comparison

Frequently Asked Questions

How does the Tree Breezer size compare to the Newport H2?

The Newport H2 is about 4mm shorter than the Tree Breezer. We suggest ordering 1/2 size up in Newport H2. The Tree Breezer has an internal fit offset of 0mm compared to -4mm for the Newport H2.

Do these shoes fit wide feet comfortably?

The Tree Breezer has a standard medium width profile, while the Newport H2 is standard medium.