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Finding Your Perfect Fit

Allbirds fit true to size for most customers. If you have wide feet or are between sizes, we suggest you size up for all styles except our Tree Runner (size down for those).

Our Wool material adjusts to foot shape, while Tree is more elastic and retains its shape, so fit may vary by style or personal preference. Still debating? No worries—our hassle-free 30-day return policy allows you to try us on for size and find the perfect pair.

Sizing Chart

Men's sizes are 1.5 smaller than women's - for example, if you are a women's 10.5, you can purchase a men's 9.

WOMEN
US 5 6 7 8 9 10
UK 2.5 3.5 4.5 5.5 6.5 7.5
Euro 34 35 36 38 39 40.5
cm 21.6 22.5 23.5 24.5 25 26
MEN
US 8 9 10 11 12 13 14
UK 7 8 9 10 11 12 13
Euro 40 41 42 44 45 45.5 47
cm 25.4 26 27 28 29 30 30.5

More questions? Get in touch with one of our fit specialists at help@allbirds.co.uk.

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