I've suffered with muscle pain in my calves for years. The only thing that I can do to alleviate the cramps is stretch my calves multiple times a day. This is my second try with compression socks and I'm very happy with these. They are the right amount of pressure without being uncomfortable. When I take them off at the end of the day, my calves are so light and I have zero pain. They fall just under my knees and I'm 5'3". I wear a 7.5 shoe and the S/M are a perfect fit. I'm so glad I found these!