The translucent Scor-Mat fits exactly in the recessed area of your Scor-Pal (or your Martha Stewart Score Board) . It is almost 12" x 12". On one side is a self-healing cutting mat with 1/8th increments in white and inch markings in black. We recommend the use of a sharp craft knife rather than a rotary cutter. The other side is a shiny work surface. Zip-Dry Glue and Scor-Tape can easily be removed from this surface. This is NOT a silicon backing. Do not apply direct heat from any source, such as a hot embossing gun or hot glue gun. After scoring, no need to put your Scor-Pal away, simply insert the Scor-Mat and work away.