Do you need extra markers for your nice Board Game? Or you are making some “Print and Play” games where you need extra tokens for your fun?
Here's one Key marker from a series of other markers for your delight.
This Key is designed to be printed easily on a FDM printer in any material. You can scale it on your slicer to have bigger sizes.
This picture shows a print that I made at my printer with the following specs:
The author marked this model as their own original creation.