I had my foot fitted on the shoe fitting machine (forget the name) and I got the boots that the machine said I should get.
They were tight at first, but timmytard suggested I warm them up ( by wearing them around) and then kick a tire or solid beam in your home. Worked like a charm!
I did put the insoles of my choice in before I kick packed them but a side from that they fit perfect to the shoe fitting machine. And..... I did use my normal medium snowboard sock.............