My wife purchased a set of these for my birthday.

She bought them in the same size as what I wear in a tennis shoe and I've found them to fit similarly.

The Vibram outer sole makes for an incredibly comfortable feel. I've added a Power Step insole to my Mizuno running shoes and found the insole to add stability and comfort. I thought I would have needed to do the same with these, but have been pleasantly surprised to find that the fit is snug and comfortable. Adding the insole would seem completely unnecessary.

I'm of the mindset that if Bates sells a version of these in black leather, I will add them to my wish list.