I drew this, and I still stand by it. All you gotta do is watch like 3 episodes of any true crime murder thing and you'll notice that this little message here would solve a lot of problems. Just saying.
 
This patch is 3.5 inches by 5.5 inches (the print is that size; the fabric is cut bigger), hand screenprinted with white ink on black fabric (not canvas, I use broadcloth; it's thinner but the print looks 10x better), and it's heat set and washable.