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Envelope

The envelope is a commonly used item for enclosing and protecting documents, letters, or other flat objects. It is typically made of paper or thin cardboard and is rectangular in shape. The envelope features a foldable flap that can be sealed to secure its contents. It comes in various sizes to accommodate different paper sizes and can be plain or decorated with patterns or designs. The envelope serves as a convenient and professional way to send and receive important correspondence, ensuring the privacy and safety of its contents.