I love these little slippers. They are great for a run to the mailbox and just around the house, Pilates or yoga. They last a long time.  My first pair I got a year ago and still wear everyday. Just got two more pairs. I did order down a size this time. I wear a size 8-81/2 in women's shoes and got the large the first time but I found that they stretch out with time so picked up two pairs in the medium and they fit perfectly. Buy multiples when they offer them with free shipping!