Knowing how to make an envelope is a handy craft skill ... TIP: This envelope-making tutorial uses an ordinary A6 size postcard and an A4 sheet of paper. This is a great size to practice with ...

Fold one corner of an A4 piece of paper back on itself to make a triangle ... Fold the top of the envelope down to make a crease and unfold it again. Now, take the right flap and fold it back ...