The file 'Square Filament Sample 3D Printer Model' is (stl) file type, size is 33.6KB.
UPDATE:
I also made a holder for these samples:
https://www.thingiverse.com/thing:4774639
Little filament sample with layer height in mm.
There is a staircase pattern with 0.2mm - 0.4mm - 0.6mm - 0.8mm
The top layer where the text rest is 1mm.
Total height is 2mm.
FILAMENT_SAMPLE_SQUARE.stl | 155.4KB |