Product review (1 stars): very poor quality
I wear a size 9 or 10 in womens'. These are supposed to be "one size fits all". They are probably a size 5 or 6 and way too small. The little "heaters" in each slipper are covered by a very thin piece of cellophane type paper connected to the USB cord by a tiny wire. Needless to say, one of them ripped from the cord the 2nd time I wore them, so they no longer work. Very disappointed in this product. If they actually came in sizes and the heaters were more durable, this would be a great idea!