I am a female who usually wears a 9-9 1/2 D width in women's shoes.  I got this in a Men's 9 & it fits great.  I have a square front foot which fits great because this shoe has a square toe box. I also have a very high arch.  I have custom orthotics so I take out the removable liner that Keen has & they fit great.  If I use only their liner then I can wear a heavier sock or 2 pr. of socks.  The shoe strings allow for great adjustability.

I did have to remove the small sewn-in tags that are on the inside of the boot as they were rubbing on my sensitive ankle even through my socks-but now it seems fine.

Not sure just how warm they will be but I think they will be great for walking the dog, going to the store, etc.in our Wisconsin winters.

Great shoe & would buy these again!