Does Allbirds run true to size?

Allbirds women's shoes, by its own chart

Its chart cannot tell

Allbirds does not publish the foot length each size is built for, so its own chart cannot say whether it runs small or large. Its size labels are compared with other brands below.

Source: Allbirds size guide, checked 2026-09-18.

Convert your size to Allbirds Allbirds products and size chart

If you wear this at another brand, buy this at Allbirds

US women's sizes. Each cell reads the other brand's own chart, then finds the Allbirds size built for the same foot (or the same label, when one chart has no foot lengths).
You wear	Size 7 there	Size 8 there	Size 9 there
Nike	Allbirds 7	Allbirds 8	Allbirds 9
adidas	Allbirds 7	Allbirds 8	Allbirds 9
HOKA	Allbirds 7	Allbirds 8	Allbirds 9
Brooks	Allbirds 7	Allbirds 8	Allbirds 9
ASICS	Allbirds 7	Allbirds 8	Allbirds 9
New Balance	Allbirds 7	Allbirds 8	Allbirds 9
On	Allbirds 7	Allbirds 8	Allbirds 9
Saucony	Allbirds 7	Allbirds 8	Allbirds 9

Every size, not just these three: follow a brand name for the full Allbirds table.

What a size chart cannot tell you

A chart gives one number per size: the foot length. Width, toe box shape, the heel and how much the upper stretches are on no chart, and they decide whether a shoe feels short. That is why people sometimes say a brand runs small when its chart says it runs long: a narrow toe box can crowd a foot the chart says fits.

If you have wide feet or sit between sizes, take the larger size, or check whether the model comes in a wide fit.

Wearer reports appear on the shoe converter once five people who own both brands have told us what fits. They rank above the charts, because charts describe a shoe and wearers describe a fit. Add a pair you own to help.