Great for Dungeons & Dragons, Pathfinder, and other tabletop role-playing miniatures games Constructed of heavy-duty double-sided laminated chipboard over 1/8" thick. Each pack weighs over 2 lbs. Pre-draw your maps before the game with all the details you want and then only reveal them one at a time during the game to maintain the fog of war. Compatible with dry-erase, wet-erase, and liquid chalk markers. Tested with dozens of brands of markers by leaving the ink on for weeks -- and it still wipes off easily. Both sizes of tiles have 1" grids and are fully compatible with each other. Use 10" tiles for large rooms and areas. Use 5" tiles for smaller rooms and corridors.