NWOT, never worn bought them while traveling without trying them on. I usually wear a 12, but Birkenstocks run a little larger. Here’s what the site has to say: Slip your feet into comfort with the Birkenstock® Arizona Soft Footbed - Suede slip-on sandal. Cork footbed is crafted from cork that is 100% renewable and sustainable. EVA outsole offers lightweight, shock absorbing support with lasting durability. Neutral heel profile and deep heel cup keeps the natural padding of your foot under the heel, distributing your body weight more evenly. Raised toe bar is designed to encourage the natural gripping motion of your feet. Suede-lined, contoured footbed molds to the shape of your foot creating a custom footbed that supports and cradles with every step.