birkenstock yao white birko-flor 2 39 (us women's 8-8.5) narrow birkenstock women's birkenstock, yao slide sandal - narrow width. a laid back, casual comfort sandal style. birko-flor uppers slide style sandal for an easy on and off with two adjustable buckle straps cork footbed for lightweight cushioned support raised toe bar encourages the natural gripping motion of your feet pronounced arch support and deep heel cup for proper foot alignment lightweight, shock-absorbing eva outsole please be advised that the birkenstock narrow width accommodates both traditional narrow and medium widths. regular accommodates regular to wide.. heel height of 0.25 inches