My design wall is pale yellow flannel over 1/2" styrofoam insulation sheets. It works great for me!

I think I got the idea from this board. I bought a foam insulation panel and use white flannel that I had on hand. Works great.

I used flannel and I leave blocks and pieces up for weeks and months. They stay put. I made the design wall using the insulation board and wrapped and taped the flannel to the back. I've been real happy with it.

Fleece will hold a large lap quilt without pins. The only thing that removes blocks is the swishing tail of a certain Border Collie. Mine is up with Velcro so I pull it down easily.

I use flannel over an insulating board. Works for me.

I have felt on foam insulation boards going down the length of my sewing room wall. It stays filled up with something on it all the time. My grandsons use it as a felt board too. I think it's important to have the design wall look attractive, I don't want to look at batting taped to a wall everyday in my sewing room.

I've used some of the ways suggested but when I purchased a length of the headliner fabric it changed my idea of a design wall. I put blocks on the headliner and leave them for a couple of weeks with none of the blocks dropping off. I also have an insulation board wall but have to use pins to hold the blocks. I know the flannel backed tablecloths work well for short term-I've given them to 4-H students to audition their blocks and then roll them up to keep until next session. The tablecloths are very economical but I'm very happy to have spent the money for the headliner--it was about $12 yd when I got mine at Hancock's a few years ago. It is 54" wide and found in the home dec dept.

MY DH had this pink insulation foam, the hard kind, left overfrom redoing our basement. I asked him if he would wrap a piece in flannel, he did, and I've got a design board. you can make it as big as you want.

I used cotton batting for mine, and blocks stick to it very well.