Originally Posted by Lacelady
6 inch x 24 inch. My favourite make is Omnigrid, comes with both black and yellow markings, so is easy to see on almost every fabric. It's wide enough to cut fabric when it is only folded once, whereas a 12 inch ruler would need the fabric to be folded twice.
The Olfa in the same size is the one I have and I love it cause it has a lip which is great to keep your ruler steady against your board!