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.
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Fold each of the side pieces in half with the folded side toward the center piece.
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Then layer the side fabrics on top of the backing fabric.
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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