Small (Women 5 - 5.5) (Girls 1 - 5) (Boys 1 - 5) * Medium (Women 6 - 9) (Men 7 - 9) * Large (Women 9.5 - 15) (Men 9.5 - 15) * Although this method of measuring will get you close to finding your shoe cover size, each shoe is different, therefore, we cannot guarantee a perfect fit using this method.