Straight Edge rulers. I have one 4ft and one 6ft. They are coated metal and very inexpensive. $12 for the longest one at Lowes. They are 2 1/2 inches wide. Perfect for straight edges on the quilt and marking grid lines for quilting. I also use a laser line level that shines a perfect 90 degree angle. I darken the room, lay out my quilt to be aligned with one beam and can see exactly where the quilt isn't square if not aligned with the other beam.
Last edited by Onebyone; 12-06-2015 at 11:11 AM.