Patchwork ruler 9.5 x 9.5"Sew easy NL4158 A medium sized ruler, ideal for cutting squares up to 9. 5 inches, blocks, half squares and quarter square triangles. Useful for home sewing projects and general measurement work they can be used with rotary cutters. Suitable for both left and right hand use. Made from tough, durable acrylic and laser cut for smoother, more accurate cutting. Improved, sharper, two colour grid with all essential measurements clearly marked.