Cutting Mat Medium 60cm x 45cm 63381. Self-healing, professional quality rotary mat especially designed for use with OLFA rotary cutters. Double-sided use with a metric grid on one side and an inch grid on the other. 600mm x 450mm x 1.6mm ( 24 x 18) both sides (inches / cm）grids model. Useful in surface and blade protection with rotary cutters.