There is a new June Tailor ruler, called the Shape Cut Pro Ruler. It measures 20" X 23". It only has slot increments of 2 1/2", and "accommodates full width of fabric." So, sounds like if you're into making your own jelly rolls, this might be of interest to you. It's kind of pricey, so I won't be purchasing it any time soon. I have nothing to do with June Tailor or her products, but I'm all for anything that will make fabric cutting easier. Here's a link to the company's web page. They have far more things than I thought they did, including projects and how to use their products.
http://www.junetailor.com/Index.htm
Enjoy.
Holly