I really wish this shoe worked for me.  I read reviews which warned they were narrow but I still hoped they might work.  I ordered my regular size, they fit one foot perfectly and the other its just too tight on.  I have read that some people use a soup can to stretch out the plastic and that is a temporary fix.  When I do that the too tight shoe is tolerable. Otherwise, very tight.  When I was able to wear them they were wonderful, very comfortable, otherwise perfect.  If you have anything wider than a normal width foot- these may not work for you. If you decide to try them, keep the box. The seller will not accept returns without it.