Origami Letterfolds
Origami Letterfolds are folded notes, like an envelope except that the letter is folded into the final form, you don’t need an envelope.
These origami letterfolds can be used in place of a card or letter in an envelope. Great for birthday invitations and other occasions.
Anyone born in the 90’s should remember passing folded notes in class. There are also a few more letterfolds on the origami photo tutorials page.