I got these for a Halloween costume and they are outstanding.  The size was perfect.  My only issue is with the zipper in the back.  I have VERY large calves (require rear entry ski boots) and can't zip them up.  They look so good, however that I'll either take them to a tailor for adjustment or rig something up myself to make them work.  I'm quite impressed with the quality, look, and finish.
If you have normally sized legs these should fit just fine.  Even if you had smaller calves, you could probably just wrap a piece of neutral or skin colored fabric around them to take up any extra space.
In a perfect world, these would have buckle straps on the back instead of a zipper so it could be adjusted.
But I'm still happy. :)