True-to-Size Millimeter Sizing Comparison

Allbirds Tree Breezer vs Crocs Work Work Bistro (Unisex)

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
Crocs Work Work Bistro (Unisex)
4.0(3,951 reviews)
Fit TendencyRuns Large (+4mm)
Width ProfileWide
View Full Work Bistro (Unisex) Breakdown
Fit Verdict

Work Bistro (Unisex) Runs Slightly Larger

The Work Bistro (Unisex) provides about 4mm more internal length than the Tree Breezer. We suggest ordering 1/2 size down in Work Bistro (Unisex).

Length Delta+4 mm
Width Delta+3 mm

Interactive Size Converter

Select what size you wear in the Tree Breezer to see your calculated size in the Work Bistro (Unisex).

Recommended Size in Crocs Work Work Bistro (Unisex)
US 8100% Match

Internal shoe cavity difference: 0.0 mm (snugger)

Complete Size Conversion Matrix

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

Tree Breezer (US)Internal CavityWork Bistro (Unisex) EquivalentMatch AccuracyFit Difference
US 3.5240 mmUS 70%+31.0 mm
US 4243 mmUS 70%+28.0 mm
US 4.5247 mmUS 70%+24.0 mm
US 5250 mmUS 70%+21.0 mm
US 5.5253 mmUS 70%+18.0 mm
US 6257 mmUS 70%+14.0 mm
US 6.5260 mmUS 70%+11.0 mm
US 7267 mmUS 753%+4.0 mm
US 7.5270 mmUS 788%+1.0 mm
US 8273 mmUS 7.588%+1.0 mm
US 8.5277 mmUS 8100%0.0 mm
US 9280 mmUS 8.588%+1.0 mm
US 9.5283 mmUS 988%+1.0 mm
US 10287 mmUS 9.5100%0.0 mm
US 10.5290 mmUS 1088%+1.0 mm
US 11293 mmUS 10.588%+1.0 mm
US 11.5297 mmUS 11100%0.0 mm
US 12300 mmUS 11.588%+1.0 mm
US 12.5303 mmUS 1288%+1.0 mm
US 13307 mmUS 12.5100%0.0 mm
US 14313 mmUS 1376%-2.0 mm

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Frequently Asked Questions

How does the Tree Breezer size compare to the Work Bistro (Unisex)?

The Work Bistro (Unisex) provides about 4mm more internal length than the Tree Breezer. We suggest ordering 1/2 size down in Work Bistro (Unisex). The Tree Breezer has an internal fit offset of 0mm compared to 4mm for the Work Bistro (Unisex).

Do these shoes fit wide feet comfortably?

The Tree Breezer has a standard medium width profile, while the Work Bistro (Unisex) is roomy/wide.