Cricut Self-Healing Cutting Mat 30x30cm (CC SELF HEAL MAT) - 12" x 12" (30.5 cm x 30.5 cm) reference marks match Cricut machine mat size, Durable, extra-thick 12" x 12" (30.5 cm x 30.5 cm) mat with self-healing surface, Double-sided with large, easy-to-read numbers on wide 1" border, Not for use in Cricut machines