This boot has been great. Very comfortable to walk in, and fun design.
I usually wear a 7.5-8 size shoe.  I order the 8 and it fits great.  The boot has some room in the foot area for a thicker sock and is a bit slimmer in the ankle area.  Being more narrow in the ankle is great so your foot does not slosh around.  Probably not a great option for someone with thick ankles.
I am very happy with the boot.