These bases were designed for 15mm scale models. Each base is 2mm tall at the Z axis (the standard height we use for our 15mm models) and the X and Y are 12mm (for dwarves, halflings, et cetera). 15mm (humans, elves, humanoid aliens, et cetera) and up to 40mm for varying sizes of monsters.
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...)