In reply to girlymonkey:
Shoes I have or have had (large and wide feet)
Vivobarefoot, width does vary across styles, try before you buy.
Merrell trail glove
Lems, not the most durable soles on their lighter weight shoes but very comfortable.
Vibram five fingers, not for everyone but I like them.
ECCO sandals for when I want a thicker sole.
Haix are my go to for safety boots, but they also do wide fit "normal" boots, expensive but best I've found.
For MTB 5.10 Freerider Pro are the best I've found so far.
I do have my eye on some Vans wide fit, but not tried them yet.
Never found a measurement for width on any of the manufacturers sites other than E or EE American shoes/boots seem to come varying widths.