Triple hook saves at least two holes in your wall.

Fits on 20x25 cm print bed slightly rotated. Use enough perimeters and top and bottom layers for strength.

Printed mine with these settings:

• 0.35 mm speed profile
• 5 x top and bottom layers 
• 4 x perimeters
• 0.8 mm extrusion width for everything (with 0.6 mm nozzle)
• 25% gyroid infill