Materials: cloth, scissors, chalk, iron.
1. Draw the line where you want to put the zipper on the watch cloth that is ready to make the zipper.
2. Fold both sides of the handle in half, and cut a 45 degree bevel with the scissors at the end of the line.
3. Find the midpoint of the line, fold the cloth in half, and reduce the end of the line at the other end to a 45 degree bevel.
4. Unfold and cut along the line.
5. Fold the extra part to the opposite side and iron the opposite side with an iron.
6. Sew the cloth that has been prepared in advance to make pockets on the lower end of the zipper. The lining should be a little wider than the size of the zipper reserved in advance, so that the openings on both sides can be sealed later. Keep to the edge when sewing to avoid leakage when sewing the surface cloth.