How to make an envelope
Lay the card on a sheet of paper.
Fold the end of the paper over the card
Fold the other end of the paper over the card. If it doesn’t overlap, you will need a bigger sheet of paper.
Fold one side.
Fold the other side.
Open the paper.
Cut off the for corners on the folds.
Round the remaining corners. Use a lid to draw the corners if you want guidelines.
Glue the sides and the flap shut (don’t forget to sign the card first!)
Decorate the envelope or seal with a sticker.