You will need a heddle for each warp end listed on the top row of your pattern draft. String heddles should be made of a sturdy cotton string such as cotton rug warp or seine twine. You can also use 8-5/8" Texsolv heddles. Both kinds of heddles are reusable and are installed during the warping process.
Measure a string heddle by tying the string around pegs B, 1, and 5. Tie the string with a square knot and trim the ends to 1/2" long. Remove the heddle and set it aside. Repeat until you have made enough string heddles for your pattern draft.