First off, I think these run large-- just a touch.  I am between an 8.5 and 9 and I am SWIMMING in them.  BUT because I read reviews on mia boots I had decided I wanted them larger so I could insert a shoe pad in it for added comfort.

After feeling them, though, I don't think that was necessary.  I don't find they are uncomfortable-- they fit like a pair of BCBG boots so I am accustomed to walking in the way these shoes force you to.

Shaft is WIDE.  My calves are athletic and I can't wear about 50% of the boots on the market.  These have PLENTY of extra room.

VERY stylish boots.  I LOVE THEM and I don't think anyone would go wrong ordering a pair!