Cut accurate half-square triangles with the SEW EASY 90° triangle ruler, designed for quilters who want repeatable shapes without tracing templates. Ruler measures 6 1/2 x 6 7/8 in and is marked to cut half-square triangles from 1/2 to 6 1/2 in finished size, with an integrated 1/4 in seam allowance. Made from clear, laser-cut acrylic with easy-to-read markings and a hang hole for visible storage between projects.