Mine is made of foam core and covered with headliner fabric. Size is 4 feet x 8 feet. I have two. One is always upright in my sewing room and used for individual blocks, pictures, etc, the other is used in the family room when I a whole quilt to lay out. Unfortunately my cats LOVE the design walls for climbing. One climbs the wall in the sewing room and sleeps on the top. When I get the other one out they all come running as they think it is play time. Once they have that out of their system I can use it to preview the layout.