To make a Christmas bow out of ribbon, you'll need a few supplies: ribbon, scissors, and a ruler or measuring tape. First, measure and cut two pieces of ribbon that are both 30 inches long. These will be the tails of your bow. Then, cut a piece of ribbon that is 15 inches long. This will be the center of your bow. Fold the center piece of ribbon in half to make a loop, and then tie a knot to secure it. Finally, wrap the tails of the ribbon around the center piece to create a bow shape, and secure the ends with tape.