Multiple sizes:

• The pins are 120mm tall, with the thickest middle part at 30, 40, 50, 60, 70, and 80 in diameter (mm).

Printing:

• The pins can be printed without support.
• I recommend printing in fuzzy skin mode for the surface to have a good grip.

Hanging:

• Each pin has a 10mm diameter through hole in the center. For my application, I made a loop through the pins with  a length of cheap paracord and tied a knot at the bottom to hang them. If your cord is too thick, you can scale up the model accordingly.

Disclaimer:

• Depending on the material of your filament, the cord you use, your body weight and other variables, the pins might fail. Use your best judgement and be careful.