My present design wall is just extra batting pieces and I added trim around it to spiff it up a bit. Problem is when you need to pin something to the batting there's nothing behind it to stick the pin into. Picked up some foam board and had them cut to size as it will take 2 pcs 48 x 70 to fill my wall so that makes it 96w x 70h. Then online I found a large enough flannel that will cover it in one piece from EverythingQuilts.com. Will need to cut it height and a little bit width as its 3yds x 3 yds. Now to find the time to pull the old design wall down and put up the new one. Think I'll need to get my sister's help on this. I'll also add trim around it again to spiff it up. I think the foam board I picked up is just 1.5" thick, enough to stick a pin into for sure.