8.5 X 12.5'' Turn a round ruler. CGR812. Easy to read black & white markings. 1in grid with 1/8in & 1/4in increments. Use numerical white dots & 1/4in grip sides to cut whole inches. Turn-a-Round to use the 1/2in grip side & numerical black dots to add the seam allowance. Gripper holds fabric while cutting. Exclusive line.