I have created this small and quick print (20x20x1 mm) so you can quickly test the surface quality of your printer and calibrate accordingly. The model prints in under 10 minutes, and has a small wedge which you can use to easily pry it off the bed.
I have also included the Blender file in case you want to edit it further.
The author marked this model as their own original creation. Imported from Thingiverse.