What size should I get in Allbirds Tree Runner Go?

Shoe Fit calculates your millimeter shoe cavity to recommend your exact size in the Allbirds Tree Runner Go by comparing against shoes you already own.

AllbirdsUnisex

Tree Runner Go

Fit verdict, size conversion guide, and millimeter measurements.

Find Your Size

Fit Analysis & Sizing Advice

Order 1/2 Size Up

This shoe runs approximately 4mm shorter than standard sizing. If you are between sizes or prefer a relaxed fit, go a half size up.

Runs Small (–8mm)True to SizeRuns Large (+8mm)

Snug / 1 Size UpStandard fitRoomy / 1 Size Down

Width: Standard Width (Medium). Conforms to standard medium width.

Community Fit Consensus

Aggregated feedback from verified shoe owners

4.6

(567 ratings)

61% of wearers report this shoe fits True to Size.

Length Distribution

Runs Small26%

True to Size61%

Runs Large13%

Width Distribution

Runs Narrow30%

Standard Width57%

Runs Wide13%

Complete Size Chart

Showing 21 sizes

EU	US (M)	UK	Foot Length	Cavity Length
36	3.5	3	24.0 cm	236 mm
36.5	4	3.5	24.3 cm	239 mm
37	4.5	4	24.7 cm	243 mm
37.5	5	4.5	25.0 cm	246 mm
38	5.5	5	25.3 cm	249 mm
38.5	6	5.5	25.7 cm	253 mm
39	6.5	6	26.0 cm	256 mm
40	7	6.5	26.7 cm	263 mm
40.5	7.5	7	27.0 cm	266 mm
41	8	7.5	27.3 cm	269 mm
41.5	8.5	8	27.7 cm	273 mm
42	9	8.5	28.0 cm	276 mm
42.5	9.5	9	28.3 cm	279 mm
43	10	9.5	28.7 cm	283 mm
43.5	10.5	10	29.0 cm	286 mm
44	11	10.5	29.3 cm	289 mm
44.5	11.5	11	29.7 cm	293 mm
45	12	11.5	30.0 cm	296 mm
45.5	12.5	12	30.3 cm	299 mm
46	13	12.5	30.7 cm	303 mm
47	14	13.5	31.3 cm	309 mm

Frequently Asked Questions

Does the Allbirds Tree Runner Go run big or small?

It tends to run slightly small. We recommend going a half size up for the best fit. This shoe runs approximately 4mm shorter than standard sizing. If you are between sizes or prefer a relaxed fit, go a half size up.

How does Shoe Fit determine shoe sizing?

Shoe Fit calculates the real-world interior shoe cavity in millimeters combined with real owner feedback, rather than relying on arbitrary brand charts.

Find Your Exact Size

Already own a shoe that fits well? Shoe Fit cross-references its internal cavity against the Allbirds Tree Runner Go to give you your personalized size.

Instant recommendation

Accounts for width & stretch

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Compare With Your Shoe

Model Details

BrandAllbirds

ModelTree Runner Go

Gender SpecUnisex

Sizes Offered21 sizes

Community Rating4.6 ★ (567 votes)

Fit Data SourceCommunity Validated

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