This coaster holder will hold any 100mm diameter coaster. You will just have to adjust the height depending on how thick you make your coasters and how thick the cork backing is if you apply one on the back of your coasters. The settings worked fine for me but I'm still new to 3D printing so you might find a setting that would work better for you.

I would greatly appreciate it if you could take a moment and rate my models and profiles, Thanks