Size: One size fits all. These insoles are made of 5mm memory foam, which provides cushioning and support for your feet all day long. They help relieve foot pain and keep your feet dry and fresh throughout the day. They are ideal for working, standing, long walks, hiking, or running. The removable soft cushioned insole provides maximum comfort and reduces sweating and odors. They fit most shoes, such as running shoes, work shoes, sneakers, casual shoes, slippers, flats, etc.