I wear a size 8 in shoes and that is what I ordered.  The fit is good as far as length goes but as other reviewers have mentioned the slipper seems to fit too loose in the heel.  It slips up and down when you walk.  The toe box also seems slightly narrower than other Emu boots or slippers I've tried on.  They still fit and feel comfortable, but take this into consideration if you have a wider foot.  Overall good quality and seem to be well made.  Don't know what to say about the heel issue.