MDF 25mm or 1" bases that I assembled to use as space fillers for my lasercut projects. Produces plenty of bases per sheet with a minimum 0.5" safety margin around edge of the frame.
Formatted for cutting on 3mm MDF cut from 12" x 9" (Arch A sheet size) - four of these would fit within an (Arch C) 24" x 18" sheet size or across the bed of an Epilog Helix. I have provided the PDF and a SVG files that I converted online at https://cloudconvert.com/vsd-to-svg. Shared as is.
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