I picked up some Keen Warm boots (200g Thinsulate) this fall but I wouldn't call them wide. I usually wear a US 10E or EE and I had to get these 1/2 size larger to get enough width to wear them with heavy wool socks. They don't specify a width, but I'd say they fit like most Ds and they don't come in a wide.
Outside of being only of average width, the Keen Warms have proven to be very good winter commuting boots. They are water and windproof, moderately insulated, and with good wool socks I've been able to ride up to two hours at around zero F before my toes got uncomfortably cold. They are a lot lighter and less clunky than my Rocky winter boots but the Rockys are also taller and a whole lot warmer, good to -25F or lower even without wool socks. I've done extrication and rescue ops in -40F windchills wearing them and my feet never got uncomfortable, at least until I got indoors, then they cook. I've ridden bike with the Rockys but they feel huge compared to the lighter Keens.
Last edited by Myosmith; 02-10-14 at 07:46 AM.