• No Infill, No top layers
• 1 perimeter
• 0.2 mm layer hight
• 3 bottom layers
• Disable “Ensure vertical shell thickness” (PrusaSlicer)
• No brim or supports

Troubleshooting
https://www.reddit.com/r/3Dprinting/wiki/troubleshootingandcalibration

Some quick tipps:

Extrusion width
Check if the thickness of one of the outside walls at the top matches the setting in your silcer
E-steps / rotation distance (X, Y, Z)
If the outside dimensions are not 20 mm but way off, correct the settings for the affected axis
Bridging / cooling
If the bridging perimeters in the top center are drooping/sagging, check cooling an bridging settings in your slicer
45° overhangs
If the perimeters in this section are drooping/sagging, check the part cooling and cooling settings in your slicer
Speed / accelleration
ringing, bulged corners - you may want to reduce speed and/or accelleration (also see Preassure advance / linear advance)
First layer / bed adhesion
If there are problems with the print adhering to the bed, check if
- the bed is level and parallel to the x-axis
- the bed is clean - no dirt or grease
- the bed temperature is correct
If the print is wider at the bottom (first few layers) than at the top, check your z-offset and first layer settings
Retraction (stringing test)
If you experience stringing, check your retraction and cooling settings
Preassure advance / linear advance
If large seam gaps or bulged corners appear, consider tuning your printer firmware settings for preassure advance (Marlin) / linear advance (Klipper)