Magnetic Sewing Machine Seam Guide enables you to sew perfectly even seams
along a straight line. With needle in down position, simply place this handy
magnetic aid to desired width on the metal throat plate bed of the sewing
machine. Run edge of fabric along seam guide while stitching, this helps
organize the fabric for straighter, more exact, uniform seam lines. The knob on
the guide makes it easy to place or remove the guide from your sewing machine.
(not including Knob): 1/4”.