This OMNIGRIP square ruler is made for accurate cutting and squaring at the quilting or sewing cutting table. The clear acrylic ruler measures 6½" × 6½" (16.5 × 16.5 cm) and includes easy-read markings plus guides that support common triangle and seam-alignment work. Use it to keep seams and edges lined up so pieced units stay consistent and need fewer touch-up trims, This supports cleaner joins and more predictable piecing.