"Folded paper type", post-cards of private manufacture made by folding and, or pasting together two or more layers of paper cannot be transmitted by post as a post-card.
Size of Postcard 14 cm. X 9 cm.
A Postcard cannot have anything attached to it. It should not be folded, cut or otherwise altered except that the impressed postage stamp may be perforated with initials, nor should it be enclosed in cover of any kind.
A single post-card has a stamp of the prescribed value impressed on it. A reply postcard has a stamp of the prescribed value impressed on each card. One part of the reply postcard is intended to contain the sender's communication.