This 45 degree ruler can be used to cut half-square triangles up to a finished size of 8". The tip of the ruler is trimmed allowing squares and triangles to be cut from the same strip of fabric. There is a 1/4" dashed seam allowance line printed along the outer edge. Equipped with Creative Grid's exclusive grip, this ruler slides easily on fabric yet stays in place when pressure is applied. Use the included instructions or scan the QR code to view a video demonstration. Made in the USA. Designed by Rachel Cross.