No ordinary cardstock or mat board, Little Sizzles Papers were made for the unique dimensions of Sizzix die-cutting. This Mat Board perfectly fits the unique dimensions of Sizzix ScoreBoards XL and can also be used with Bigz and Originals dies (each sold separately). This 6" x 13" Mat Board Pack contains six black sheets. The thickness of each mat board sheet is approximately 0.047". All Little Sizzles mat board are acid free.