We need 1 stripe – 0,5 cm on 20 cm, maybe a bit shorter.
1 stripe – 2,4 cm on 16 cm.
1 wooden stick or hard wire, which I used, it is important to straighten it well. I took 12 cm hard wire.
Mark with the dots every 0,4 cm 16 cm stripe. I did it on the top and bottom for easy cut.
Cut it, like you see on the picture. After glue the thin stripe around hard wire in order to cover it.
Glue 16 cm stripe on the edges under the angle, like on the picture, twisting it at the middle.
Cut pointy edges for straighten it. Make snails for both sides. One 5 cm on 1 cm with thread for hanging ornament and second only 5 cm on 1 cm foam. Glue snails to the edges.
You can leave just the way it is or add some decoration, like beads or ribbon on the top.