I went to a screen and window place and had the gentlemen make all different odd sizes rulers from Plexiglas - round - square - triangle etc. he thought I was nuts his wife asked why was I doing this and I explained that I quilt (beginner) and found that for 1 ruler I could spend big $ - her reaction was funny - she turns to her husband and say honey your "Honey Do" list just got bigger he just shook his head and smiled - but for 12 rulers I paid maybe $22 bucks. Can't beat that - I also had him put a hole on them so that I can store them on a round belt hanger.