Socks may be black or white at the top cuff. Women's knit compression socks in 8-15 mmHg mild compression. Mild compression is great for walking all day, sitting all day or running. Perfect travel sock to help with circulation issues. Can help with the pain of varicose veins. Women's one size socks fit women's shoe sizes 7-12 and calf width to 17". Ideal sock for nurses, doctors, medical personnel, office workers, travelers, grocery store clerks. Medically-accurate compression helps with circulation issues of the legs and feet, and can help reduce tired legs at the end of the day. Stretch knit foot, ankle and calf is easy to wear. Machine wash, line dry to help maintain the compression. Balloon toe allows for wiggle room in the toe area, to help reduce cramped toes. 3 pairs! What a deal!