The shoe was to big.  I'm a size 6 and the size recommendation (from the seller or manufacturer) for my size is a 37, which usually fits a size 7 foot.  I thought since this is my first pair of Birkenstocks they are sized differently.  The shoe was too large and was very uncomfortable to wear, almost to the point of painful.  I sent them right back.  Very disappointed.  Really wanted a pair for the summer.