A Word 2013 document’s orientation can be either portrait or landscape. Portrait is a standard page in which the tall part of the paper runs along the left and right sides. Landscape is a rotated page in which the tall part of the paper runs along the top and bottom.
The standard paper size in the U.S. is 8.5 x 11 inches, also known as Letter. Most of the templates available through Word use this paper size, although some exceptions exist. For example, an envelope template might use a page size that matches a standard business envelope, or a legal brief template might use legal-size paper (8.5 x 14 inches).