Most major airlines provide seating layouts for each type of plane they employ, including the common Boeing 757, on their websites. American Airlines and United Air are two such companies that provide these seating charts for the convenience of their customers. Layouts can be found at AA.com and United.com, respectively.
The seating layouts provided by airlines provide extensive information on number of seats, seat size and standard recline. In addition to seating information, AA.com provides information on the width, depth and height of available storage space both under the seats and in the overhead bins. These layouts and dimensions are standard on most Boeing 757 airplanes and are thus transferable to most flights.