Buste da foglio A4 origami

Fonte: https://www.paperkawaii.com/easy-origami-envelope-letterfold-by-simon-andersen/

- cm 14,8 x 7,5

Fonte: http://www.origami-instructions.com/origami-bamboo-letterfold.html

- cm 10,5 x 8,5

Fonte: https://improvisedlife.com/2011/12/06/triangle-letter-how-to-mail-for-free/
- cm 20,5 x 14,8