A 45 degree angle is printed in black and is used to trim half-square triangles to size. White horizontal and vertical lines are printed on the square so the center of the ruler is easily distinguishable. Use these lines to square up blocks based on four-patches or embroidered and appliqued blocks. Sold Individually.This 3-1/2 inch square features easy-to-read black and white markings printed in 1 inch grids marked in 1/8 inch and 1/4 inch increments. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Weight: 0.04 Pounds, Manufacturer: Creative Grids