Ordered these Birkenstocks for my 12-year old daughter who has narrow feet.  We specifically ordered size narrow in hopes that they would work.  Upon receiving them, they appeared to be the same width as normal Birks.  I've had a few pairs and have the same problem.  I slipped my size 11 foot into these with buckles on the tightest setting, and they were still loose.  The box was marked narrow but they sure did't seem that way to m.  Sadly, we had to return.