Do not believe the reviews which say that this boot runs large - they are full of it.  This boot is narrower than most other EMU styles in the calf/ankle area, as well as the foot area.  I normally wear a size 5 1/2 to a 6 narrow, so I ordered these in a 5 because numerous reviewers said "it's so big."  Ha!  I got the boot on, but my toes were just smashed and the boot felt very uncomfortable.  It felt like a size 7 would have been a better fit.  The boot itself is lined in wool and it felt warm, but obviously not a high-quality sheepskin - for the sale price of $25, it's kind of hard to complain.