OLFA Gridded Cutting Mat: * Self-healing rotary mat * Helps extend the life of rotary blades * Protects your cutting surface * 1.5mm thick triple layer * Provides precise measuring and cutting capabilities * Dark green base color and yellow grid lines on one side * Solid green on the reverse * Dimensions: 12" x 18" * Imported * Store flat; do not roll * Keep away from extreme heat and cold