I did the same thing with the Dollar store foam boards. I found them in the stationery section of the store...with the pens, pencils and notebooks. Both black and white. They are in a large box, sitting on the floor. Hope your store has them. It has worked so well in my sewing room. Helps me to be more organized and less cluttered. I select a fabric, cut it and put it back...most of the time. Best $30 I ever spent!