I wear 8.5 shoes. I bought this is 39 narrow and it is a good fit.
This shoe appears to be real leather. I bought from Bayou Birkenstocks seller .
I bought it not for the looks but for comfort so I can walk  long distances in the city.
I did get blisters the first day I walked  and now have to wait till they heal :(
I would buy again due to comfort of the footbed as these are much better  than regular flip flops.