I wear women's 9/10 and ordered the medium. I want to be able to wear my corrective shoes and orthotics around the house and keep the carpet clean. I received the correct size, but they were way too big. The bottom panel of the cover is an inch wider than the width and an inch longer than length of my shoe. The side walls come up so high they come past my shoe and leave uncomfortable elastic marks on my skin. I imagine the elastic would be tighter on the next size down, so I can't decide if I'm going to try the small or try another product altogether.