Set of 4 square quilting rulers: 12.5 inches / 9.5 inches / 6 inches / 4.5 inches. Ideal ruler for patchwork, quilting, sewing, DIY, and crafting. Corner lines and grid lines: Designed for precise measuring and cutting, this clear acrylic ruler features transparent and wear-resistant scales (accurate to 1.8 inches) and angles (30º, 45º, and 60º). Reasonable design scales for precise cutting. Non-slip surface ensures a good grip. The specially treated graduations are wear-resistant and remain clear. This quilting ruler measures accurately and is made of hard material, allowing you to achieve a completely professional result. The sewing ruler can slide parallel to the surface of the material to be cut or measured and adapts perfectly when pressed. The acrylic sewing ruler is very hard, which prevents breakage and extends its service life.