I wear a size 7.5 women's and ordered the small after getting a shoe conversion from Tingley's website. I live in Florida so I'm not using them for snow protection. Instead I'm using them to work outside in my garden to keep pollen, grass, dirt, and wet feet out of my house.  They also work great for protecting my shoes when I'm outside tending to my pets.  So far I'm very happy with the overall fit and ease of use.