I've ordered these plush boots before in a different style.  They lasted about three years before needing another pair, which is not bad considering I wear them daily all over my home.  These boots are very comfortable "house shoes"...very soft and plush, and excellent at keeping my feet warm. I got a Large because I wear a size 10 and L seems to be for people in sizes 9-10 in standard US women's foot sizes.  I personally found them to be a good fit. They were a little snug when you first try them on but once you wear them around for a little while, they loosen to the right size. Last time, I had purchased an X-L size which usually fits a size 10-11 foot...once I broke those in, I found them to be a bit loose, so I think these Large-sized shoes are a good fit for me. I am very satisfied with my purchase.