We got to see plenty of leaked photos of the front panel of the Samsung Galaxy Note III yesterday, but a new photo from today includes the front panel of the Galaxy Note II and puts things in perspective. After many different values for the screen diagonal of the Note III, the rumor mill seems to have settled on 5.7". That would make for another 0.2" jump, after the original Note had a 5.3"...
Source: http://www.gsmarena.com/galaxy_note_iii_panel_pictured_next_to_note_ii_panel-news-6662.php