Eyebrows are the frame for your face, and they help define your look. Brow pencils are a great way to create a natural-looking brow line, and they're easy to use. Brow pencils come in a variety of shapes, sizes, and colors. Brow pencils can be used to draw in your eyebrows or fill them in with color. Brow pencils can also be used to create the illusion of thicker eyebrows.