Solid in color with a border in another color. These prayer flags are used for an ancient and very special purpose, using the elemental color to raise the chi of the aspects that each color refers to. For instance, if you want to enhance your personal elemental color of birth you would put up a flag of that element color to strengthen your chi. You can use the green flag for strengthening your health chi, the red flag to strengthen your energy or to give protection, and so forth. These are to be mounted outside on a pole in front of your home or office.Each flag is about 9 feet long.