I am on my third chevron quilt for my grandchildren and I do the same as ManiacQuilter2....cut 5" squares, sew 1/4" either side of the diagonal mid line, cut along the midline, press and trim to 4.5" HST. I sew 4 HST together which will give me an 8.5" chevron. Chevrons when sewn together for my top are a final measurement of 8". Look forward to pictures of yours.