First, wrap yarn around the cardboard piece.
Next, crease the cardboard down the center and make a "tunnel" like shown below
After that, slip a piece of the hemp twine into the tunnel and tie off the yarn in the center. It will look like a bow.
Slip the bundle of yarn off the cardboard.
Then, wrap the hemp around the back of the bundle and tie it off. Each knot should be tied just as tight as you can get it.
Bring the hemp around the front once more and tie again. This is just for some extra security. Next, cut off any excess hemp cording with scissors.
Pull the loops with scissors and cut them a small bunch at a time.
Trip the yarn with scissors.
This is what it should look like.