The OLFA RM-17S rotating cutting mat provides a larger turning surface for quilting blocks and templates that need frequent direction changes. It measures 17 in × 17 in (432 × 432 mm) and combines a non-slip base with a self-healing top mat that rotates 360 degrees for smooth, repeatable angle cutting. Turn the mat, not the fabric, to keep pieces positioned while cutting shapes like triangles, diamonds, and circles.