I *finally* ordered these to go with the Jileon extra wide rainboots (size 9E) and ordered the Medium (size 7-9).  They fit the boot really well, but the only downside is that they didn't really work well unless I put these on FIRST, and then put the boots on.  (Less like a built-in liner, and more like a giant sock.)

However, that is a small price to pay because they are heavenly.  I wore my rainboots for an all day family outing and walked all day, with warm, dry feet (in 25 degree weather with strong winds).  I agree that the brand on the top is a little over the top, but the boots also have a large logo.  I even had someone ask me if I liked my boots/liners!