I used one shoe size and bought the size he recommended based on other shoes he compared to mine. The size is about half a size smaller. I wore NPC II over 20 years ago. They were like gloves on your feet. They're not that flexible. But I wanted a casual shoe that was comfortable, yet understated enough that I could wear it to a casual night out or around Europe without looking out of place. I will keep them. They just aren't as good as the older models of the same name.