Does anyone have the June Taylor Shape Cut Plus Ruler? It is so valuable - expensive but worth it, especially if you get it 50% off at Joann Fabrics. I've worn one out and am well on my way through my second one. I have cut as many as 6 or even 8 layers at a time and zip along cutting strips of any size. Mine is 18 inches wide and if I am cutting 2 1/2 inch strips, I can cut 7 stacks without moving the ruler or needing to trim up the edges. I highly recommend this. I use it almost all the time.
Here's a photo.