These marker/scatter terrain bits were designed for our sci-fantasy tabletop RPG, Wayfarer: Things Beyond Wonder and for our modular wargaming system, Wayfarer Tactics. If you want to print a 28mm scale version, just scale it up by 180%. Also, if you want to re-organize these components to form your own loot piles, the files are available to hack in TinkerCAD, so go nuts!
We've set up a Patreon page for anyone who's interested in helping to fund us so we can keep making free and open sourced games like Pocket-Tactics, Wayfarer Tactics. and others, not to mention the growing catalog of gaming miniatures that you can use for whatever you want! (Psst... we take requests and commissions...)