We received schematics for the Galaxy S8 duo with dimensions and discovered something amazing - the upcoming S8 will be about as big as the S7 it replaces, but its screen will be as big as that of the S7 edge! Similarly, the Galaxy S8 Plus will have a honking 6.3" screen in a body about the size of the S7 edge. Now, the rule for screens is that there's no such thing as "too big," just look at people's reaction to the Xiaomi Mi Mix. As with the Mix, slender bezels are key, because there's definitely such a thing as a phone that's too big. With that in mind, we wonder which model will be...
Source: http://www.gsmarena.com/weekly_poll_what_do_you_think_of_samsung_galaxy_s8s_screen_size-news-22883.php
