I made a big board out of 48"X72" thick plywood. I made a frame on the bottom out of 1"X2" (I think) that just fit around the edges of my ironing board. I covered it with two layers of batting that wrapped over the edges and covered that with two layers of inexpensive muslin from Hobby Lobby. I used upholstery (sp?)tacks to secure it to the bottom of the board. I can iron backings on it easily and it is a great place to store "parts" of the project I'm working on. I love it!