The longer version of my favourite ruler, this tool is so handy. Measuring and impressive 15 x 60cm, with a grid of centimetres clearly marked out, this ruler is perfect for measuring out the squares, rectangles and triangles needed for sewing projects. I use to quickly and accurately cut out longer pattern pieces. You can use with a rotary cutter for superb results. Equally, you can use with a chalk marker and scissors if you prefer. There is a 1cm seam allowance clearly marked out on 2 of the edges. It really is a great product!