Repair a hole in fabric
Here are the basics of repairing a worn out knee with a patch that is hemmed on both sides. These same ten steps can be used to patch a hole in virtually any fabric item.
1. Following the threads in the denim, cut off the frazzled edges so that the hole is square or rectangular in shape.
2. From an old pair of jeans, cut a patch that is one inch larger on all sides than the hole you are repairing. The edges of the patch should follow the threads in the cloth. Cut a 1/4-inch square out of each corner of the patch.
3. Put the patch inside the jeans leg and center it beneath the hole. Be sure the right side of the fabric is showing through the hole. Pin it securely.
4. Baste the patch in place, running the stitches about 3/4 inch from the edge of the hole.
5. From the right side of the knee, make a 1/4-inch diagonal cut in each of the four corners of the hole. (See image below.)
6. On each side of the hole, fold the fabric to the inside. Baste the folded edge to the patch.
7. Turn the jeans inside out. Remove the basting stitches from the outside edge of the patch.
8. Fold the edge of the patch under on all four sides. Baste the folded edges to the jeans. (See image below.)
9. Press the patch smoothly, lifting the iron up and down rather than sliding it across the fabric.
10. Stitch the edges down on both sides by hand with a hemming stitch, or sew around all edges with your sewing machine. Remove all basting stitches.
When my children were young, I bought a lot of their jeans at garage sales. Often I found jeans that were in excellent condition except for holes in the knees. I bought them for a small price and patched them. It was a good way to save a lot of money.