Letter writing paper is a type of stationery paper used for writing letters. It is typically 8.5 inches by 11 inches in size and comes in a variety of colors and styles. It is often sold in packs of 50 or 100 sheets and can be used for both personal and professional correspondence. The paper is usually pre-printed with lines or a border design to make it easier to write on. Letter writing paper can also be used to create cards and invitations.