I saw a piece on Facebook, 5-Minute Crafts on the Jan. 9, 5:30am post which showed a person hand stitching with a blanket stitch. Let's see if I can explain it. She made two marks on the thumb of the hand she held the blanket. These marks were the distance she wanted between the stitches and her thumb kept the depth level the same. I don't see why you could not make a template (stiff paper/paper board) to accomplish the same results.