The Creative Grids Quick Trim ruler is 12.5" x 3.5" and all quilters should have one. It does a LOT! Not only is it a ruler, it's also a compass, you can use it for flying geese and attic windows. You can also use it for perfect mitered bindings you can machine stitch (on say placemats) made by bringing your fabric from the back to the front. Also, you can trim your border or binding strips on the 45 before sewing them together and so many other things.