I wanted a base I could put under my standard 30mm minifigs to keep track of their health. Some games also need to keep track of a unit number, so I made a version of the outer sleeves to keep track of that as well. The two pieces (inner and outer) slide and snap together without tolerances being too fussy. I used a Sharpie to color in the numbers. I've seen other counters for cardboard standees that are definitely slimmer than mine, but didn't see one that worked with a based minifig, so I made my own!

Modeled in OnShape