I had been wanting/needing a design board for years. I admit, I take way too much time to finally decide how I want to do something (I call it being anal). Finally, I just dove in and purchased two 4x8 sheets of pink insulation board and yards and yards of flannel. I sewed the flannel together because it was not quite as wide as my 4x8 sheets. My neighbor came over and helped me spray the foam board with adhesive, then we stretched and glued the flannel pieces to the boards. When I need both boards together (making a queen or king size quilt), I use florist pins to hold the two boards together. If I don't need the design wall out, I can stack them together in my fabric storage closet up against a wall. I have a queen size quilt on it now. Being short, I use a ladder or step-stool to get to the top of it to pin blocks on it.