I was unable to find a good challenge coin holder that would fit a variety of my coins. I have round ones, octagon ones, and they all have varying thicknesses. This design seems to fit all of them including smaller coins. I tried to make it so it would minimize how much of the stand is visible from the front (I want the focus to be the coin, not the holder). 

I have printed with Overture PLA using a 0.4mm (~30 min print) and 0.8mm nozzle (~15 min print), both work great. I used 25% infill, no supports needed, simple print.

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