I ordered my normal size, and while the length of the boot seems normal, the upper part of the boot doesn't fit snug at all, and the lower seems a bit sloppy.

That said, these are incredibly warm.  I use them in the house, and probably will remain, as I don't want to be 'one of those guys'.  Although up until now I always ripped on them, now I just understand how warm and toasty they keep your feet.  Man up (or..is that down) and buy a pair of these, you won't regret it.