Awesome product!  I put these on as soon as they came in the mail and have been loving them ever since.  I wear a 10.5-11 shoe depending on the brand, ordered an 11 here and they fit great.  If you are looking for arch support, these are not the way to go.  They are a sandal with a shoe-like upper and will not provide you with good support for your feet the way Crocs will.  I think I recall reading a review where someone put Crocs insoles in their Sanuks.  If you fall in to that category and are buying these, maybe give that a shot.  Otherwise, excellent product.  I will likely purchase another pair in the near future!