"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.
Because 'newspapers' is noun and it is coming before the adjective 'small'. So,it should be klein,the word will not end with -e but maybe it can change in some cases like when there is het word or plural. I m not that much good in explaining but maybe this can help you. (Or maybe i can be wrong)