This 4-1/2 by 4-1/2-Inch Grid Ruler was made from a durable premium quality acrylic plastic and laser cut for a smooth edge that allows for easier deeper cutting of fabric layers. The patented double line effect is printed in black and yellow which allows the used to see the grid on both dark and light fabrics. Designed for left and right handed users. Used for sewing, scrapbooking, crafts, weaving, and more. Has 45-degree angle lines marked for easy alignment of fabric. Has 1/8-inch grid and 1/2-inch seam allowances on 2 sides. Made in USA.