Sizing was off.  I have worn a 38 N for years and have had no problem with my Birkenstocks. I ordered these thinking I would try the soft footbed. Well to my surprise my toes came right to the end and my heel barely fit in the heel cup.  Sent them right back.  I'm afraid to order next size up They may be to big.  I will have to go to my local store and try on for a good fit.