This is what I use. My house has many windows so I don't have a blank wall I could put a tablecloth on. It is very lightweight and I put it in the garage when I am not using it. I do like others ideas for flannel backed table clothes.

My son and daughter in law bought me a king size flannel sheet. It was put on a wall that was perfect for the size and stays there, it has beenv a great pin up wall for me.

Some have mentioned using a projector screen because it can be pulled up and down. I don't use one. I lay everything on a bed and stand back and look at it.

I saw a great idea in some of my searches. Uses an old school retractable wall map. Glue thin flannel onto the map and mount on the wall. It is out of the way when not needed. Been looking a thrift shops to purchase one for myself.

I was lucky enough to get an office fabric covered room divider from freecycle

Bought foam sheeting from Menards, then white flannel 108" from Nancy's Notion, (online). Taped with duct tape. My husband helped me so I could get it very tight and smooth. works great

I found an old large piece of polyester batting that I had stashed away years ago. It works great tacked to my wall. And I feel good about using something I saved from years ago!

I really don't have a wall or door to use so I bought a spring loaded curtan rod & pinned a piece of poly batting on it & put it inside the door frame of a double closet with the doors closed in my sewing room. Hope that is clear??

Mine is a permanent 4'x6' wall- 1 sheet of insulation glued to a piece of plywood screwed into the wall. I cut the sheet of insulation about an inch bigger than the board which allowed me to wrap batting around and tack from the back. Looks great and cost about $30. The only caution is to use very fine pins so the insulation won't crumble. Actually, it works so well that I rarely use pins anyway!

I bought two insulation boards at the local hardware store and then duct taped the two of them together so could double my size to 8x8. Then I used cotton batting to hang on it with 505 glue spray so can be removed when it shifts a bit. I have had the batting on it for over 5 years and it still is attached and nicely shaped. I think with it being attached with the 505, it stays nicely. I pin and can just set blocks on and they stay. I pin because when you blow by or a breeze from window comes in, they will fall off. When done with, it folds nicely and store away behind sofa or in garage. It could even slide under a full size bed if that is what you have.