Unless I am mistaken these will be the biggest winglets on any modern day airplane. Very large!
http://www.airliners.net/photo/Amer...ht=1589&sok=&sort=&photo_nr=&prev_id=&next_id=http://www.airliners.net/photo/American Airlines/Boeing 767-323/ER/1370220/M
http://www.airliners.net/photo/Amer...ht=1589&sok=&sort=&photo_nr=&prev_id=&next_id=http://www.airliners.net/photo/American Airlines/Boeing 767-323/ER/1370220/M