Our 3 x 8 Handy Straight has measured lines every 1/4" as well as diagonal markings on the 45˚ angle and is perfect for straight line sewing and stitching-in-the-ditch. The ruler measures 3" tall x 8" long and is made of 1/4" acrylic which is safe for use with machine quilting ruler work with a ruler foot and will work with low shank machines.