X-ACTO Self Healing Mats are a unique accessory that is a must-have for hobbyists and designers who frequently use X-ACTO knives and cutting tools. These cutting mats feature a special surface material which allows them to absorb cuts from a sharp knife or cutting tool and then magically retain their original surface. You won't even be able to find the cut! Self healing cutting mats preserve the surfaces around your workspace! This self healing cutting mats also feature a one inch grid pattern for accurate cutting, slicing and trimming. Mat measures 12" x 18".