Self-healing cutting mat with a crisp, professional look sized 18" x 12". Printed with essential 30°, 45° and 60° angle guides and imperial measurements for accurate cuts. A 90° indicator shows where two 45° lines meet, plus two parallel 45° lines spaced 2 inches apart to help with bias and triangle cuts. Grey background with high-contrast yellow lines improves visibility on both light and dark fabrics. Protects your table and extends the life of rotary blades and craft knives.