This Set Includes (6) 12" X 12" Mats That Are Designed To Snap Together Like A Puzzle To Make (1) 24" X 36", Or (1) 12" X 72" Mat, Or Any Variation You Could Possible Need. You Can Add Additional Sets To Make An Even Bigger Rotary Cutting Area If You Need To. Long Life Storage Case Included (12-3/4"..