Am-Tech Quality Tools Cutting Mats, selection of 3 sizes.
These cutting mats preserve your work surface from damage when using utility craft knives or cutters and make the blades last longer as they do not get blunted on a hard surface.
The surface is effectively self-healing, so would last a long time, but can be damaged after considerable use or if cut very deeply or harshly.
Sizes are as shown below:
A2 : 45 x 60 cm / 450 x 600 mm / approx. 18 x 24 inches
A3 : 30 x 45 cm / 300 x 450 mm / approx. 12 x 18 inches
A4 : 22 x 30 cm / 220 x 300 mm / approx. 9 x 12 inches
All mats are 3mm thick. 1cm (10mm) guide lines are pre-printed on one side of the mats, but both sides can be used to cut on.