Quilt Ruler 12 1/2"x 12 1/2"This 12 1 2in square ruler by Rachel Cross from Creative Grids is perfect for trimming one of the most popular sized blocks used in many quilting patterns. Easy to read black and white markings are printed in 1in grids marked in 1 8in and 1 4in increments. Use the black numbers printed on white dots and the 1 4in grip sides to cut whole inches. Use the Turn a Round feature to cut 1 2in increments by following the white numbers on black dots and 1 2in