. You can sew it by hand, by machine or simply take it to a dry cleaners who will sew it on for you for around $5 - $10. If you ask me I would just spare the extra few dollars to make sure it is done right the first time. This will save you a lot of hassle in the long run. If you do decide to sew it on by hand it could take forever. Especially if you sew on an "X" in the middle of the patch so that if your opponent grabs and pulls it, it prevents it from ripping off. That also is a good idea to do when sewing on your Bjj Gi Patch.