Sperry's are funny, they can run all different ways depending on the type. These particular ones are not as long on the top and seem to run a bit wide. I think that the half size down would have to been small in the length so I am keeping them as is. The shoes look great on and go with many different outfits. All in all I would say order the size you usually wear and know that they may be a bit to wide. The price was right though, so I certainly can't complain there.