SEW EASY square ruler is a quilting tool for cutting and squaring blocks, trimming patchwork units, and checking measurements as you sew. The ruler size is 9-1/2" x 9-1/2" (24. 1 x 24 for consistent results across your project and store flat between uses to keep lines clear to keep lines clear to keep lines clear to keep lines clear to keep lines clear to keep lines clear to keep lines clear to keep lines clear.