Cut your ribbon to length. I find that 28 inches works well for large bows and 18 inches for small ones. If you are NOT using wire-edged ribbon, see my tips below for stiffening the ribbon before proceeding.
Start by adding wire into your Bowdabra.
Fold your ribbon where you have two loops of equal size and two tails of equal size.
Add the ribbon to the Bowdabra.
Push the ribbon all the way down to the bottom.
Use the piece for the Bowdabra to make sure the ribbon is pushed down well.
Wrap the wire around the center of the ribbon and pull tight. Use the wire to lift the bow out of the Bowdabra.
Tighten and twist the wire several times to create your bow.