Love these. I keep them in the messenger bag that I use for work so that they are always with me. I ordered the small size first. I wear various Merrell shoes (women's size 8)which have thick big bottoms. I didn't care for how hard they were to stretch onto my shoes so I sold them to a friend with size 6 feet, and bought size medium which are perfect for me.  I have used these on packed-down snowy sidewalks and sheer ice on my job's parking lot. I am sorry that I didn't buy something like this years ago!