From the back of the box: Dungeon Floor Plans are a specially designed role-playing fame aid for adventures using 25mm figures. Contains 12 coloured sheets of card with a superimposed square grid as follows: Six sheets representing stone/dirt flooring for passageways One sheet representing wooden surfaces Four sheets representing flagstone flooring for Rooms One sheet representing Stone Stairs Each sheet is to be cut up by the user using a sharp knife. (Description taken from the 1982 version)