I own mostly Clarks brand shoes, so did not hesitate too long before buying them without trying them on.  Fit pretty well, a little large, but doable.  Starting in July, I wore them throughout the summer most days.  It is true that these sandals do not have much arch support.  By the beginning of October, I noticed that the inner sole had developed a number of holes.  I called Clarks to see about a replacement.  They no longer make this sandal, but offered me a 25% discount on shoes ordered from their website exclusively.  I got the impression from the customer service rep (who repeated a number of times) that wearing the sandals everyday was the cause of the problem.  Not supposed to wear them daily??  I gave the sandals 2 stars because they worked well for the summer, but I will look for another brand for next summer.  Clarks Leisa Bora sandals are too pricey to be disposable.