Ribbon envelope

Here is an easy envelope fold that stays securely closed without glue or stickers. This origami by Laura Kruskal is folded from a sheet of a standard size: A4, A3, etc. Starting from an A4 sheet, you will get a small envelope of about 8 cm by 10.5 cm, so to fit a standard-size card you will need a bigger sheet (A3, for example). Otherwise, you can always use it as a letter-envelope fold: write your message on the sheet, then fold the origami straight from it!