This set includes 6 Rock Pile Hex Tiles. All my hexes are designed to use 4x6mm round magnets, they just push into the holes.
This set is designed with my new V2 Tiles, these have a keyway that allows a 3d printed "key" to be used to help lock the tiles together. I'm working on a press in key but right now it slides in and this makes it difficult to use on all sides at the same time, but it does help stabilize the set and reduces the need for the magnets.
I also include a Blank Hex that has the key, it can be split from the stl to just print the keys.
These are 240mm wide at the widest point, they can be scaled to whatever size your printer is and should not cause issues.
Each hex is flat with rocks as part of the print. The nice thing about them is that you can redesign the course and attach the tiles in any order/alignment. They are also much lighter and use less filament than my 29 hex 5'x3' terrain set.