How to Engrave Airpod Cases and Airpart Cases

i like really small fonts. I would like my case engraved with a small font, but i don't have anything. And i really wish that they had let me just get my initials, but use the smallest ssible font size. So obviously, just matching for a known list of swear words is not going to work. But things like putting a unicode thin space between the f and the u, you know, would that work? Would that get it past a? It's been a wild roller cost over five years. My eyesight is actually much better for small stuff than it was two or three years ago. Ff, when i take, take my glasses off, or use