There is software called Triangulations that allows you to print papers in multiple sizes for half square triangles, quarter square triangles, and I don't know what else. I have an older version that I've used and it was really easy. You have it right at your fingertips whenever you want it.
https://www.amazon.com/Bear-Paw-Tria.../dp/1936207168
I know there are other products you can purchase, but this is what I have.
Leslie