Build as big a chunk of open space as you want! This set of map panels map includes a mix of Rosette and Standard panels which line up quite nicely and which are flat and smooth. They have 5/8" hexes on one side and 1.25" on the other side and are "geomorphic," which means you can plunk them down in any order, and they will line up nicely with other map panels in either scale. (Avoid using some panels with one scale and some with the other scale, as this will confuse everybody.)