It's really simple. Select plastic rod that you want for the size of your rivet. Slice like bread:
Place on your piece. Repeat a bazillion times. The pro to this method is that it doesn't require any special tools. If you need just a few then it works great. The con is consistency. It's tough to get them all the same thickness with crisp cuts.
Screw that noise.
I needed a lot of rivets, like thousands. So I decided to invest in a hole punches:
I picked these up on Amazon for around $8 each. I got a 1/8 and 1/16 inch punch. Well worth it given I need a lot of rivets.
With the punch method you cut the rivets out of a plastic sheet:
This gives you complete control over the consistency. Plus it's really boring.
Next time, we'll see what all this excitement got us to.