This is an envelope made from a square I created in 2005. The sequence is logical and has in my opinion a certain rhytm. All the folds visible in the endresult are mountain folds. It resembles a raindrop or teardrop, hence the Dutch name "Druppel" which means "drop".
This is the weblog of the Envelope and Letterfold Association, ELFA. This is still in concept. In the future there will be many diagrams to fold envelopes and letters.
The Envelope and Letter Fold Association is an international group of people who like to fold envelopes and letters. It's related to origami.
It's fun and practical to fold your own letters or envelopes and send them through the mail without using a standard envelope. Also a gift is beautifully wrapped in a self folded envelope.