I do inlaid images in cedar and, when finished, I have the cut outs that are not used. I have been selling them very cheaply, and giving them away for years. Last month a customer suggested I use the cutouts of Texas as coasters so I tried it. Sold out in a heart beat.
I have since made and sold over 250 of them. I sell them four for $5. A great price point at the farmers market. Some of them are 3/8" thick and others are less than 1/4". Thickness seems to not matter to the buyers.
I am now making some of scrap 1/4" plywood. I ran out of my whole scrap horde of various other woods, making them.
I stack cut them and dip them in Poly a few coats and then a spray finish of poly.
Attached is a photo of some I made of a mystery wood I had. It may be cherry.