I made a huge large queen pp quilt for my daughter - didn't have a 1/4" ruler - they probably didn't even have them at that time - I recently made another large quilt with lots of PP'ing, and was wishing I had it with that previous quilt - it's not a necessity, but if you have one, you'll probably also find other uses for it - not expensive compared to some things us gals ( and guys) buy for this hobby - I just used it to mark lines for a project I was working on from the CRAFTSY class.