The ugliest throw alive
I heard a great way to figure out if you have a 1/4" seam. Stitch together three 1 1/2" strips, then turn it over and put a 1 inch ruler on top of the middle strip. If it goes from seam to seam exactly, then you have the correct 1/4" seam. If not, do it again lining up where it should be until you come up with a perfect one inch, then you will know where your 1/4" line is on your sewing machine. I did that, and am now having things line up much better.