Line Tamer quilting ruler by Four Paws Quilting.
This ruler is great for quilting straight lines or stitch in the ditch.
3 sizes to select from:
1/2" in 10 1/2" length - standard template
1?2" in 7 1/2" length - a better fit for a smaller machine on a frame, with limited throat space or just prefer to handle the smaller template
and 9/16" for Gammill & APQS long arm machines (tin lizzie foot)