Styracosaurus 3D puzzle kit card

The model is divided into 4 cards that fit most print plates. The pieces are 2.5mm thick. You can scale them up or down if you need. Once you print the cards you have to break the thin tabs that hold them together and then you can assemble them as a puzzle. If you need a cheat to figure out how to put the pieces together correctly you can check the numbers in each slot to pair them together with the other side.

Added a sample model to test the fit between parts, so you can print it first and adjust your print settings accordingly so you don't waste filament.

Disclaimer: You may need to adjust the horizontal expansion in your slicer setting to make the pieces fit together correctly. I've already added a bit of a gap margin in the STL files, but results may vary depending on your printer and filament.