I have the medium and the small. I bought them as a package deal along with several others of hers. They seem to be good rulers. I am just getting into ruler work and I have had no problem using them. She has a quilt along that she just finished on The quilt show web site. You have to go to her “classroom” and keep scrolling up to the June ruler video.
https://thequiltshow.com/daily-blog/...mastery-series