Chessex Megamat is a 26 x 23.5 inches vinyl RPG map with 1 inch (2.5cm) Squares on one side, 1 inch (2.5cm) Hexes on the other. Useful for nearly every roll playing game and miniature game available on the market today. Chessex mats are made from expanded vinyl to bring you the highest quality mat currently available. Write on the mat using WET erase markers, such as Chessex Lumocolor Markers (CHX315WP4). When the adventure is over, erase with a damp paper towel or a mild detergent solution.