Any size square, 5 or 6 of them. Prettier when both sided are in color. Fold in 1/2 diagonally. Unfold bottom left to center crease. Repeat for right. Fold right tip down...
Fold left tip down. Make 5 or 6. Glue each point onto button or what have you.
You can also glue them back to back for a fuller decoration as shown. Or you can increase the size of each set of 5-6 squares. This will make nice full nestled together flower. More ideas?