Easy to read black & white markings. 1in grid with 1/8in& 1/4in increments. Use numerical white dots & 1/4in gripsides to cut whole inches. Turn-a-Round to use the 1/2ingrip side & numerical black dots to add the seam allownance. Non slip gripper moves easily over fabric until pressure is applied then holds fabric in place to avoid slipping and miscuts.