For use with any sit-down or frame system machine, the Line Tamer template by Four Paws Quilting offers precise control of your ruler foot and is perfect for straight-line quilting, stitch-in-the-ditch, cross-hatching, and outline quilting.  This template has an opening down the middle of the template that measures 1/2" wide, so make sure your ruler foot is no larger than 1/2".

10 1/2 inches long. 

You will need a ruler foot specific to your sewing machine to use this template.