The document margins for facing page papers are top, bottom, inside, and outside. The inner margin is the side of any page that is bound. Each page's outside margin is its outside edge. The outer margin is the distance in inches from the outside edge of one page to the opposite page if they were glued together. For example, if you have a paper with a width of 8.5 inches and a height of 11 inches, then your inside margin would be 4.5 inches, your outside margin would be 9.5 inches, and your total margin would be 13 inches. It is important to leave this amount of space on all sides of the paper because you will need it to fit in the binding later. Most books are bound with pages in half sheets or full sheets. Half sheets are those that are 5 3/4 by 8 1/4 inches, while full sheets are 7 by 11 inches. Even though most books are now printed on sheets that are smaller than an average-size book, for consistency reasons we still call them half sheets and full sheets. You should avoid using staples to bind your paper because they can damage delicate sheets of music or photographs. Instead, use tape or glue. When taping pages together, allow about 1/4 inch of tape over the edges of each page.