I've never done it before, so most of it was a trial-and-error approach. And I think I might disappoint you — I don’t have a scale. To me, it feels very limiting. When I create something, I love working with my hands and I avoid using a ruler almost entirely.
They are from paper...It was struggle. Because columns aren't straight and need some shaping...There were several attempts...and slowly I got the shape I want it.