felt for design wall
I purchased some wide off white felt at Joann Fabrics several years ago. I don't remember the price, but it wasn't a lot. I tacked it to the wall behind my sewing machine table and it has held up very well. The only time anything has fallen off is when I was machine quilting a large quilt and it inadvertently brushed against the wall. I have used batting scraps for small size design boards and think it would probably work well on a wall too. I'd compare the price of batting to the felt prices and go with the most economical.