I have worn these Acorn Rag Wool Slippers for years.  I wanted to be prepared for next winter as my current pair of Acorn Slippers is finally wearing out on the inside sole.
The replacement pair was the right length on my foot, but the right sock top was way too tight.  Barely could get it on over my ankle. The left sock top was the perfect width even though that is my largest leg width. Other reviewers had the same problems, so obviously quality control is lacking.