these be my first pair of Birkenstocks and I have no idea about that kind of foot I have other than it be extremely narrow . I look at other comment that suggest size down , so when I normally wear a 8-8 .5 I buy a 7-7 .5 -lrb- 38 -rrb- size here . they fit just great . I think the large size would have fit also but not as well as these do . the footbed feel amazing , although the arch on the left foot be a bit higher than the arch of the right foot -lrb- although my foot could also be different size -rrb- . the right shoe fit perfectly to my foot but the left hurt a bit and I have to take break at time . the narrow fitting be great . overall , I be totally in love with these shoe .