This collapsing staff was inspired by a rubber duck, 

All collapsing staff are roughly 44 inches or about 112 cm long fully extended but that is highly dependent on tolerances of your printer and the model.

Print Settings

Layer height and infill at your discretion, I use 0.3mm layer height and 7% infill

Make sure your line width in cura is set to 0.5mm and extrusion width is set to 0.5mm in prusa slicer for perimeters 

Supports are required but if used make sure none are in the model above the rings.