What a well timed thread. Yes, I have several rulers I haven't used yet, but I will in time. I believe in having the right tools for the job. Having said that I want to tell you why this is a well timed thread. My students and I are going to be doing a scrappy quilt where we exchange 6 1/2" blocks. One of my most timid students was really dreading doing this bc she had a very bad experience with half-square triangles. I found a ruler, still in the package that I've had so long the glue dot had to be removed with GooGone. The ruler is a June Tailor Perfect half-square & quarter-square tringles. It has a slot for drawing the line from corner to corner, then you can position your half-square to cut it perfectly. This will be the perfect ruler for her to use and get over her fear of half-square triangles.
What is a 9" ruler? I don't think I have that one.