These dungeon tiles enable the game master to prepare their maps with all the details and color desired before the game and then only reveal the map one tile at a time to maintain the Fog of War. Great for hiding traps and other features on the reverse side, they are compatible with dry-erase, wet-erase, and liquid chalk markers; and easily erase even after dozens of uses. Contains 36 interlocking 5" squares with a earthtone background.