Origami Envelope
You will only need an 8.5" x 11" piece of paper.
Write Your Letter
Write a letter to someone. Turn the paper over so that the writing is face up on the desk.
Create a Crease
Fold the paper in half lengthwise so that corners 1&2 and 3&4 are touching.
Fold the Corners
Unfold the paper and fold all four corners towards the center.
Fold the Side Into the Center
Fold side A into the center crease.
Fold the Other Side Into the Crease
Fold Side C into the center crease. It should look like the picture after this step is complete.
Fold in the Pointed Ends
Fold the pointed ends towards the center. After this step, the paper should be shaped like a rectangle.
Flip the Almost Envelope Over
Turn the paper over so the "heart side" (or the "flat" side) is facing up.
Fold the Bottom Up
Fold side D towards the center. The end result of this step should look like the second picture.
Fold the Top Over the Bottom
Fold Side A over side D.
Tuck the Corners In
Tuck the corners of side A into the corners or "pockets" of Side D.