This traditional origami letter requires four-folds to form this origami letter.

This four-folds might be the most popular letter folding technique.

This traditional origami letter II requires three-folds to form this origami letter

The four-quadrant origami letter starts from 4x4 matrix base. There is no special folding technique involved with this model.

This octagon letter starts from applying four sets of kite-fold.

This octagon letter II starts from a square base and then applying two sets of kite-fold.

This flower letter starts from 4x4 matrix base. There is no special folding technique involved with this model.

This rose letter starts from 8x8 matrix base. You need to be careful when you flatten the model by pressing four flaps.

This pinwheel letter starts from 8x8 matrix base. You need to apply two crease patterns given in this model.

This pinwheel letter II starts from 4x4 matrix base. One special folding technique that you need to learn for this model is squash-fold.

The origami letter "X" starts from 8x8 matrix base. There is no special folding technique involved with this model.

This large heart envelope has a large heart symbol on the back of an envelope. The special folding techniques involved with this model are both squash-fold and inside reverse-fold.

This heart envelope has a heart symbol on the back of an envelope. It is not difficult to fold this envelope. One special folding technique that you need to know for this model is swivel-fold.

This traditional envelope allows you to learn a technique of inserting a flap into a pocket to close the envelope.

This bar envelope allows you to make an envelope with a piece of paper. Of course you will not use a knife or scissors.

This envelope has a double-bar on the back of the envelope. A special folding technique that you will learn from this model is reverse swivel-fold. Here I am using a A4 paper but you could use a letter sized paper instead.

This envelope has a butterfly shape on the back of the envelope. A special folding technique that you will learn from this model is inside reverse-fold. Here I am using a A4 paper but you could use a letter sized paper instead.

This diamond envelope starts from 8x8 matrix base. One difficulty you need to go through for this model is to apply a crease pattern (CP) shown at the step #16.