Obsolet:- after printing this out and trying it on there's a lot of changes that need to be made. I would not download this model unless you wanna use it for kitbashing as a base mesh to build on top of. At the very least the midfoot area is far too tight. Also I think scaling to the one centimetre cube is a bad idea. I've stopped using size cubes newer versions will have registration objects.
My 1st no frils 3d printebel shoes. pre fit test prototipe. UV unwraped. Mat ID's. 3 objects in file best printed all in one go. 3 diferent objects i recomend a multy matireal printer if posibel ( un tested ). 1cm scail object for eazy size chaing to fit you.