From publisher blurb:
Greystone Dungeon 1
is a printable dungeon floorplan compatible with any RPG/Dungeon-Crawl game. It can be used as a standalone gameboard, or combined with any same-scale tileset.
Consisting of 11 rooms and a long corridor, this versatile floorplan has many uses, such as a dungeon, a part of a castle, a manor house, ruins or wherever your adventures take you.
Greystone Dungeon 1 forms a 10 x 20 square area, and can be printed at 28mm and 25mm scale.