Garden stakes are cheap and common, locally they are about 25mm square but with blemishes or swelling a touch larger, this is about 27mm to accommodate for that, but it can be scaled in the slicer to suit what's available where you live.

Assemble stakes into a cage to hold netting or shade cloth.

One end is open on both sides to accommodate 2 stakes end to end. 

Holes are provided in the case you need to secure the stakes but this is not always necessary. 

This prints without supports, but you will need a good brim.