If printed on an 8.5x11 inch sheet of paper, with no margins, the ruler should be accurate.
As it turned out, two things happened before she got this printed:
- She went to a fabric store and got a measuring tape.
- I went to a store and found a similar item in the same size and measured it.
If I had thought of that first, I wouldn't have gone to all the effort. But I did, so I decided to share it in case it helps someone else.
Now I just need to finish up the project, which I will post when I am done, before I send it to him.