I have a wide foot and was concerned because they did not come in a wide width.  When I first put them on they were snug across the top of my foot.  I undid the toe strap and put two fingers under the fabric strip that goes over the toes.  Then I velcroed the strap while pulling on the fabric strip.  That solved the problem completely.  The width is fine now.  The sandals are very comfortable.  I found the arch support to be satisfactory.