A team memeber taught me this. It's a square folded and then adhered down with brads. I like it on a card but I think it would be a cute journal box for a scrapbook also.
You can make them any size but here's how we did this one- cut a 5x5 piece of double sided paper mark the middle of each side (2.5 inches) fold up triangles evenly on all sides fold the tip back of each triangle and adhere with brads