A paper piece is a term used to describe a written work that is printed on paper. An op-ed, which stands for 'opposite the editorial PAGE, ' is a type of article that expresses the opinion of the writer. A PAGE is a single side of a SHEET of paper. A LEAF is a single SHEET of paper, usually referring to one side of a book or magazine. A SHEET is two pages of paper that are connected together. An ESSAY is a type of written work that is typically longer than an op-ed and shorter than a book.