I would order a 9 if it's available. Because of the lining in the boot they fit a little snug. If you wear thick socks, they be tight. I'm not sure if the lining finally smooth out and becomes flat enough not to be snug but I ordered the next size up and ordered several pair for family members with the same thing in mind. They are cute.
According to information listed under the product overview and specs tab: Half sizes order up