Just a simple print created in Tinkercad to keep the swallows out of my carport. Designed to fit most build plates and if they are too small or too large use the resize option in your slicer of choice. PLA is fine as they do not take a lot of use and they are in the shade. The STLis just for one but lets you can fit 10 on a 200 x 200 plus build plate. If you want more just use the duplicate option in your slicer. I know I am simplifying things but if you are a new user, you need all the help you can get. I know I did not get my first 3D printer till I was 74.

Please excuse any mistakes . Quite an event for a senior citizen.