I've had many slippers like this in the past, and have always loved them!
These are super warm and snuggly thus helping me keep so many pairs of socks out of my laundry!  :-)  I LOVE them!  My cat.....he's not so sure about them. hehehe
As far as sizing for the ladies.....I'm 5'10 and normally wear a 10 in women's shoes....I purchased the large and they are PERFECT!

I'm very happy with my new snuggly gift to myself!!