One side is a self-healing cutting mat and the reverse side is a work surface perfect for stamping and other craft activities. The Scor-Mat is designed to fit perfectly into the recessed area of Scor-Pal for easy use and storage. The cutting mat is for use with a craft knife and features 1/8" white and 1" black increments. The work surface is a shiny non-silicon, great for working with adhesives such as Zip-Dry and Scor-Tape. 12 x 12