Designs have three different types of two hex long walls that work with Gloomhaven. There are walls of wood, brick and large stones. Also each design has either bases of 3 millimeters or with openLOCK. Each wall type has a half size as well to allow for ease of seeing the board for people that like the "true tile" type wall sizes. This gives a total of 12 wall designs.
The walls are designed to work with my wood floor tiles found here.