This is the seam guide ruler that I use to make sure I am getting the correct seam allowance that I need!
Place the sewing machine needle in the 1/4" hole, lower the presser foot, making sure the ruler is straight and use tape, mole skin, or a stack of postit notes or whatever you want to use as a gude up against the side of the ruler to mark your correct seam allowance.
You won't want to buy a single seam guide at $4.00 with a flat rate shipping charge of $6.00, so add this single to any book or ruler order to make your shipping worth while...
Of course -- I WILL sell you a single with $6.00 shipping if that is all you want to buy!
Orders over $75.00 ship free using the Free75 shipping code at check out.