Allbirds come in whole sizes only, but fear not! The Wool Runners and Wool Loungers are made of a super soft merino wool upper that makes them feel equal parts snug and conforming. If you typically wear a half size, we suggest sizing up in our Wool Collection.
The Tree collection is made with a knitted mesh fabric that's form-fitting and stretchy. We've found that most half sized customers size down in the Tree Runners and up in the Tree Skippers, Loungers and Toppers. This all being said, if you have a wider foot, we'd suggest going up to the next full size in each silhouette.
Everyone's feet are different, which is why we offer a 30 day no questions asked return policy, so you can return/exchange them for free if they don't work out!
And while sizing can be tricky, we know we can get your feet into the right pair because half-sizes are actually really small! This small: