I wear women's 10 1/2 or 11 medium.<br />I wear a 40 260 Milano Birkinstock. I wear a 41 273 Katika MBT sandal (10 10 1/2 M)<br />To get to the comfort I hoped for, I went to the 42 280 Amri closed men's shoe.<br />Somehow MBT went narrow. A woman's regular is like a women's narrow.<br />A man's regular is like a woman's regular, even the heel fits well.<br />A guy who needs men's medium may need to go wide.<br />Plus: this shoe feels unstable. The sole is narrow and it feels like I could turn my ankle