FINALLY the patch I got reasonably internet famous for, so much so that etsy BANNED IT, is back. I sell this as a backpatch, a shirt, and as a sticker. And yes, I drew this, it's not some old design from the 70's. A lot of people seem to think that :)
 
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.