Since I made my previous patches, I've learned how to use Inventor, and now I can make patches with more complex shapes. Consider this a teaser of what's to come.

Apply color change at 1 mm height. Print at 0.2 mm layer height.

Make sure, when you put your patch onto something, don't leave it in a hot car because it will turn into a Pringle (speaking from experience). So I suggest putting it on backpacks or things that don't need to be washed a lot 

If you'd like to make your own patch, check out blank patches here