Easy to Read: This 12 by 12 inch quilting ruler is made of high clear transparent acrylic,features black and white markings line in 1 inch grids (White) marked in 1/8 and 1/4 inch black drawing line and black number printed on white dots.Good helper for your handmade patchwork Ruler to Save Quilting Time: Square up blocks up to 12 inches;there is a cutting groove each 1/2 inch increments, just hold the rotary cutter perpendicular to the ruler along the groove and cut carefully, practice a few times and you will love this quilting tool It helps reduce rotary cutting time so much Charming ShapesIt is very convenient and fast to use the 45 degree and 60 degree angles to cut binding Stripes,squares triangles, diamonds, trapezoids and parallelograms. PackageComes with nonslip self-adhesive silicone grips can help you avoid slippage of the ruler and template when using the rotary cutter, so that the cutting is safer and more accurate.Welcome to contact buyer to get quilting instructions Aftersales: You will get all your money back if the ruler comes brocken Any question, please contact us, we will reply in 24 hours.