Medium size ruler for cutting squares up to 12½". Useful for cutting strips up to 12½" wide. Ideal for squaring up blocks. Perfect for cutting half-square and quarter-square triangles. 45° line for bias strip piecing, 60° line for equilateral triangles. Suitable for right hand and left hand use. Very useful for Home Décor sewing. Laser cut for an accurate and smooth finish. White frosted backing. Red grid with black writing.