I received these today, along with another pair of slippers I ordered.  I have a high arch, and I thought these would adjust (as my Sperry Topsider shoes do) when you untie the lace.  They do not!  I ordered these in 9W, since I wear an 8.5EEE, and could not get them on.  The other pair of slippers (same size-9W) fits perfectly, so I have to assume these are sized on the small side.

They look good, so if you have a 'normal' arch, these may work for you.  However, be aware that Amazon will charge you to return these if they do not fit.  Amazon just lost a very good customer for anything that might have to be returned because of their return policy.  I order two pair of slippers in the same size.  One fits, one does not.  Yet in Amazons wisdom, it is not their fault, so return shipping will be charged.  Cool, enjoy the $4.95 or whatever, and lose the many orders I have placed in the last year.  I will no longer buy anything from Amazon that might be problematical in sizing: including shoes, clothes, etc.