Fold your own envelope from a single sheet of A4 or letter sized paper.
Step 1: Start with letter sized (or A4) sheet of paper.
begin with a letter or A4 sized sheet. Whatever you write on the reverse side of the sheet will be wholly contained inside the final sheet.
Step 2: Fold one corner underneath fully as shown.
Step 3: Unfold same corner.
Step 4: Repeat mirror image.
Step 5: Unfold again
same as previous side
Step 6: Fold through centre where fold intersects the point of intersection of folds 2 & 4.
Step 7: Unfold all and begin a "butterfly fold" of sheet as shown.
Step 8: You should end up with what you see here.
Step 9: This shows the reverse side of that same fold from 8
Step 10: Fold the corner of this newly formed flap as shown.
Step 11: Repeat same for other side.
Step 12: Fold pockets.
place your finger inside the pocket that is created and you should be able to end up with a boxish pocket.
Step 13: Crease the sides of this box down.
Step 14: Finished step 13.
Step 15: Same as 13. and 14. for other side.
Step 16: Fold corner of new box up into opposing corner.
getting tricky now,
Step 17: Same for other side.
Step 18: Fold the envelope tongue
Fold up little tongue that is left between those last two guys
Step 19: With some luck it should look like this
Step 20: Fold nose over.
fold the entire nose over at the top of the boxes you folded in 13 & 14.
Step 21: Tuck nose under tongue
you need to tuck this new nose under the tongue you folder up in 18.
Step 22: Tuck underneath
here it is being tucked underneath. this is where you will later close the envelope into.
Step 23: Voila. getting close.
Step 24: Fold from sides.
Step 25: Same other side.
Step 26: Fold corners
now fold the corners of these new pieces over as shown.
Step 27: Fold other corner
again on other side.
Step 28: Tuck under previous folds
this whole new flap can now be tucked under your previous folds. here it is intucked.
Step 29: From: flap
and here it is tucked. a convenient flap to write your name on!
Step 30: You can address and stamp the other side and it's legal postage!
pushingtheenvelope.ai is an illustrator file so you can add your own graphics for printout.
pushingtheenvelope.jpg has my howtoon graphics and should hopefully print correctly to letter sized paper in portrait format.