How many letters does the top answer for “above average in size or number or quantity or magnitude or extent” have?

The most common answer is big (3 letters).

Crossword clue: above average in size or number or quantity or magnitude or extent

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

big 3 letters wn-def

above average in size or number or quantity or magnitude or extent

large 5 letters wn-def

above average in size or number or quantity or magnitude or extent