These are sized quite small.  I wear a 7 and the 8 is snug.  That is OK because we kayak and I need tight sandals for rocks and muddy banks.  Taking them off and putting on is not a quick process either.  The big bonus is the tread.  It is wonderful for all kinds of ground and they are comfortable to hike or portage in if there is a distance to travel in and out of put-ins.