Ordered size Small. The sole fits for a men's size 9 foot (e.g. Nike tennis shoe size 9). The upper, however, requires at least a 16" circumference calf muscle. My calves measure only ~13.5" circumference the upper is so loose all the way it sags and looks silly on me :-( . Overall, quality, look, construction, and comfort looked like they would have been pretty good.
Rating: [4 of 5 Stars!]