The 757-200 introduced an interior that became standard on all narrow-body Boeing aircraft (including the Boeing 737 Classics) until the release of the Next Generation 737, which introduced an updated interior borrowing elements from the Boeing 777-style interior. The 757 interior offers up to a six abreast layout (3+3) with a single center aisle.[4] The 757 could be ordered with either four exit doors on each side, or three exit doors plus four overwing window exit doors.[4]