Marker Generator

That's fantastic! Thanks for sharing. I used something like this for making Infinity markers/tokens.

The product in the link below works well with paper markers like this if you're looking for something that makes them more durable and perhaps permanent. Great for something like scheme markers.
The stickers in the link are 1" round which is perfect for 25mm markers. The 30mm. epoxy stickers that I have found so far (on Amazon) are expensive so it might taking some searching to find reasonably priced 30mm stickers.

Epoxy Stickers