Antonyms of noun bigness

1 sense of bigness

Sense 1
largeness, bigness -- (the property of having a relatively great size)
       Antonym of littleness (Sense 1)
      => smallness, littleness -- (the property of having a relatively small size)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun bigness

1 sense of bigness

Sense 1
largeness, bigness -- (the property of having a relatively great size)
       => size -- (the physical magnitude of something (how big it is); "a wolf is about the size of a large dog")