I've worn men's athletic shoes since 1968. My feet were too big for PF Flyer "tennis" shoes and Keds "sneakers" at that point. Gratefully, athletic shoes were emerging and a men's size 10 was serviceable for me. Men's athletic shoes are generally too wide for me. I've had two pairs of Nike "court" shoes, targeted for indoor racquet sports, that fit me perfectly. Other than that, I've struggled with heel support and overall stability. This shoe is a dream in terms of support and stability, but as noted by others, runs a tiny bit short for me in the women's size 13AA. Note that I have never had a "short" size 13 on my feet ever!!! Another first. I wore the shoes to see if they would give some, but they didn't. They're not painful, but I worry about injuries that wearing a short shoe for 4-5 mile walks 4-5 times a week might bring. I'm intending to order and try the 13M to see if they work. Otherwise, it's back to the men's department for me!