Newspaper format whose pages normally measure 315 x 470mm (8)
I believe the answer is:
berliner
(Other definitions for berliner that I've seen before include "Person from the German capital" , "JF Kennedy said he was one, Marlene Dietrich was one" , "Citizen of Germany's capital" , "European citizen < in trio" , "'Ich bin ein . . . . . . . .' (JFK)" .)