I have purchased other Clark's sandals without a problem however on this particular model there is a BIG problem.

The straps that go over the ankle are simply not long enough. I purchased a size 9W.The sole is certainly wide enough but the Velcro on the strap barely reaches the mating surface. Had I not worn them for a few hours thinking I could make an adjustment I would have returned them. Maybe a shoemaker can figure something out. If you need a wide width  stay away from these.