They use it to stack glass tealights, i.e. it is packing material.
A circle was drawn around the round cuttings. The edges have been
stitched with DMC thread, making it look just like a
picture frame. I put some paper into the "frames" with flower
designs. Many variations are possible: you can use different colours,
fewer circles, or photos instead of pictures.
Hope you like it! Saar