I wear a size 9/12 in women's, and my feet are approximately 4" wide (without socks.) As far as I know, that's considered wide but I've never really thought about it and have never worn wide shoes in my life, although many pairs of shoes I've had, especially things like slippers and moccasins, my feet sort of spill over the edges. I'm just wondering if I should wear like a C, D, or E, etc?