Sizing says 7.5 - 8.  I typically wear size 8.5 or 9, however I know that most Ugg and/or moccasin type shoes run big.  These slippers, while arriving early and looking just as they are described, feel as if the left shoe is the 7.5 and the right is the 8.  I am wearing them and will not return them, but I most likely would not buy again, just because of the sizing issue.  I purposely ordered a size smaller than I wear, because I don't like slippers that scuff when I walk, or stretch out and then I can't keep them on.  I am hoping these will continue stretching a bit.  They are not uncomfortable, just snug.  Overall I think it is a good product, just be aware that the sizing may be an issue.