Lay the fabric pretty-side down on your work surface. Fold the fabric in half with the pretty-sides out, and tuck the two-sided fusible bonding web in between the layers. Then iron it together to make one piece of sturdy two-sided fabric.
Use a plastic triangle and a rotary cutter to cut out the flags. If you don’t have a rotary cutter, trace the shape using a fabric pen or pencil then cut the shapes with a scissor. Use pinking shears if you want a scalloped edge on the flags.
When all the shapes are cut out, lay the ribbon or bias tape pretty-side down and line flags up on one edge, overlapping by a half inch. Fold the ribbon in half the long way and line up the edges so that just the tops of the flags are covered. Pin them in place.