Wool is the key to the remarkable Allbirds footwear story. This is the label, founded in sheep-rich New Zealand, that designs sustainability into every piece that they produce. Co-founder Tim Brown is a former professional footballer who wondered why, given the wide availability of wool in his home country, more footwear wasn’t made with wool as a major component. After years of experimentation, the first Allbirds shoes -  Wool Runners casual sneakers that are still central to their ranges today - were released.

With headquarters now in the United States, Allbirds have expanded beyond signature footwear to casual apparel for men and women, always simple, logo-free and with transparent sustainability credentials available on each piece before you buy. What’s more Allbirds is a certified B Corp, which means it has legally to meet social and environmental goals. There really is no compromise with this pioneering label. Looking to add some Allbirds to your wardrobe? Before you click 'add to cart', peruse our helpful Allbirds sizing guide to find your perfect fit.

Allbirds sizing notes

All Allbirds sizing is generally true to your usual size. However, some footwear is only available in whole sizes. For these shoes, Allbirds suggest that you size up, if you’re usually a half size. Clothing is to Allbirds’s own sizing standards, so be sure to use our handy chart to convert to the sizes that you’re used to.

Allbirds size charts

Men's footwear

Allbirds (UK) sizeUS sizeEU size
7841
7.58.541.5
8942
8.59.542.5
91043
9.510.543.5
101144
10.511.544.5
111245
11.512.545.5
121346
12.513.546.5
131447

Men's tops

Allbirds sizeChest size (cm)
XS86-91
S91-97
M97-102
L102-107
XL107-114
XXL114-123
3XL123-130

Men's bottoms

Allbirds sizeWaist size (cm)
XS60-65
S70-75
M80-85
L90-95
XL100-105
XXL112-117
3XL117-122

Women's footwear

Allbirds (UK) sizeUS sizeEU size
3636
3.56.536.5
4737
4.57.537.5
5838
5.58.538.5
6939
6.59.539.5
71040
7.510.540.5
81141
8.511.541.5
91242

Women's tops

Allbirds sizeBust size (cm)
XS79-87
S87-92
M92-97
L97-102
XL102-107
XXL107-117
3XL117-120

Women's bottoms

Allbirds sizeWaist size (cm)
XS61-64
S66-69
M71-74
L74-76
XL76-81
XXL92-97
3XL99-102

Check out our pick of the best minimalist sneakers for men.