This ruler is perfect for use with your rotary cutter and mat (not included). This ruler features a large size grid to accommodate the full width of fabric. 2.5 inch slot increments to cut strips for Jelly Rolls. Cut five inch strips, rotate and sub-cut for perfect five inch charm squares. Layer and cut multiple fabrics for a quick cut for class projects and kits. Ruler measures 20x23in and is constructed of clear acrylic. Made in USA.