How many letters does the top answer for “smaller than normal for its kind” have?

The most common answer is undersize (9 letters).

Crossword clue: smaller than normal for its kind

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

undersize 9 letters wn-def

smaller than normal for its kind

undersized 10 letters wn-def

smaller than normal for its kind

larger than normal for its kind 50% similar → outsize, outsized, oversize