Sew Square 4" Ruler

Sew Square 4 is a 4" by 4" clear acrylic ruler with easy to use black lines and marks. Sew square 4 has unique marks for squaring-up 4" x 4" units from multiple Sew Kind of Wonderful patterns. Sew Square rulers can easily be marked with a permanent marker (ie: Sharpie) for other patterns and other square up points. Marks can easily be removed with a little nail polish remover.