COTTAGE MILLS-Puzzlemat 24x36 Set. Six 12x12 inch mats that are designed to snap together like a puzzle to make One 24x36 or One 12x72 inch 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 (12.75x12.75x1 inch). NOTE: Mats are not self-healing. Imported.