I don't have room for a full-size design wall, but to see what several blocks look like together, I have a large sturdy piece of cardboard, covered w/ batting & flannel. I can pin to it (if i want to move it around) or just lay pieces to get the look I want. Then it's easy to store under the bed. I think my next one will be double-size w/ a crease, so it can be folded for storage. If I had the room, I'd love to have a 100" square of double-thick cork. A friend did one of these (she put 2 layers of cork on a firm backing & her husband framed it for her). She could use for notes, pin up blocks & when she needed it, it was large enough for queen-size quilts.