Place the letter face up on a flat surface
Fold the bottom third of the letter up
Fold the top third of the letter down
Press the folds flat
Insert the folded letter into the envelope
Seal the envelope if needed
Place the letter face up on a flat surface
Fold the bottom third of the letter up
Fold the top third of the letter down
Press the folds flat
Insert the folded letter into the envelope
Seal the envelope if needed