A letterhead, or letterheaded paper in Nigerian English, is the heading at the top of a sheet of letter paper (stationery). That heading usually consists of a name and an address, and a logo or corporate design, and sometimes a background pattern. The term "letterhead" is often used to refer to the whole sheet imprinted with such a heading.
Letterheads are generally printed by either the offset or letterpress methods. In most countries outside North America, company letterheads are printed A4 in size (210 mm x 297 mm). In North America, the letter size is typically 8.5 x 11 inches (215 x 280 mm).