Newspaper format whose pages normally measure about 315 x 470mm (8)

I believe the answer is:

berliner

(Other definitions for berliner that I've seen before include "'Ich bin ein . . . . . . . .' (JFK)" , "German capitalist" , "Citizen of Germany's capital" , "capital chap" , "Person from the German capital" .)

I've seen this clue in The Mirror.

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