@ai6yr
No! Micheal's, Home Depot and lot's of other stores are closer.
It looks like Micheal's stepped up to a few upholstery items to cover the void left by Joann's.
Many better choices than Uncle Bezo's slop emporium.
There are mattress manufacturing companies locally, if you have local ones maybe you can get supplies from them.
Years and years ago, I had a mattress made for my futon base, it was alternating cotton batting and foam layers, 1" each layer.
Maybe you can get what they would regard as scraps .
And it was good :D
@ai6yr We used to find furniture foam at our local military outlet store. Doesn’t exist anymore but maybe there’s still one in your area?
Also you can trim foam thickness or other dimension with an electric turkey carver. (Not making it up).
Looks like a great project!
@ai6yr
If you wanted to be swanky about it, a layer of fiberfill over the top of the foam is nice and will help create a rounded profile.
For thicker cushions I would layer dense foam at the bottom a thinner layer of softer foam, then the fiberfill.
AI Overstew
@ai6yr
1-1½" foam is fine thickness for dining chairs. Or you could go old school and use felted cotton batting.
The pattern is easy. Use that bottom support and cut padding 1" larger all around so you dont feel the hard edge of the support.
For the covering fabric, add the thickness of the pad and about 3" all around for when you wrap and staple the fabric to the support.
Remember to enlist a buddy or child for the extra hands. One to pull the fabric with pliers, one to weild the staple gun.
The brighter coloration around the edges is probably where the fabric wrap covered the wood, and kept it less oxidized and dried out. Look for staple holes.