As I do not own dryer I hang the shirt on hanger on door frame as the air flows best there…

You can see the diameter in the picture - but mine rod is 23,5mm (and has to be painted too).

You can easily scale it to your needs.

(Or you can put a curtain there or mosquito net)

I use doubleside tape secuing it to the frame.

Print material is PLA, no supports obviously, full speed… No need to increase infill or perimeters.