https://www.createdhomemade.com/2020/04/fabric-scrap-coasters.html
Sells For Approx. 12.00 on Etsy ( set of 4)
To make 1 coaster you will need 5 – 5″ squares of fabric and 1 – 5″ square of thin batting. This is a great scrap buster project!
Directions:
Lay the material out as shown in the picture below. The center piece will be the back of the coaster. Lay the piece of batting under that piece.
Fold each of the side pieces in half with the folded side toward the center piece.
Then layer the side fabrics on top of the backing fabric.
Then sew around all 4 sides. Reach into the center of the layered fabric and flip the layered fabrics to the other side. Use something with a dull point to push out the corners. Press the coaster so it lays flat. For more detailed directions for this step, visit the Fabric Mill Blog