"The newspapers are small."
Translation:De kranten zijn klein.
No. Predicative just means that the adjective is used after a verb (usually a form of be). Dutch adjectives do not change at all when they are predicative, for example in "It is big" het is groot and "they are big" zij zijn groot
When adjectives are used before a noun (to modify the noun directly), they are called attributive, and then you must sometimes add an -e as described by the rules in the Tips & Notes and in the discussion linked to above.