Here is Battletech appropriate sizes for anything! The shape and size match up with official battletech maps at 30 X 34.240MM (microscopically bigger so that each side is exactly 17.24mm and is even more aesthetically pleasing than official bases). There are large bases for your huge ship models and weird custom mechs. 7 sizes included (1x, 2x, 3x, 3x (line), 4x, 4X (line), 7X). The files were created with lightburn, so they are saved as lightburn files and GC files to cut with. I use a "Longer" model MDF laser cutter and these come out great at 180 speed, 100% power line setting. You may need to adjust this for different laser cutters and different brands/thickness of MDF.