![Chessex Reversible Battlemat 1" Squares & 1" Hexes](http://rulesofplay.co.uk/cdn/shop/files/1617_5c0e41617c8f72.25928243_battlemat_large_f8ef48c2-b53d-4575-a0aa-7894e4bb1f37_800x596.jpg?v=1717591382)
Chessex Reversible Battlemat - Rules of Play says:
These mats, first made available in 1981, have become the standard for vinyl game mats. Using water-soluble overhead-projection pens (NOT dry erase, grease pencil, or permanent markers), you can write on the vinyl and remove later with water when the adventure is done. 1" Hexes (25.4 mm)