I was kind of surprised that these feel so loose on me.  Having read that privos tend to run smallish, I was nervous about ordering a 9.5 medium for my big, flat feet - I thought I may have to size up.  They arrived in great shape, very quickly, and while comfortable as heck in the support department, I can totally flare out my toes in the toebox which is not normally the case in my experience with dressy-ish shoes.  Good, not fantastic.  I will wear them.