How many letters does the top answer for “corresponding in size or degree or extent” have?

The most common answer is commensurate (12 letters).

Crossword clue: corresponding in size or degree or extent

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

commensurate 12 letters wn-def

corresponding in size or degree or extent

not corresponding in size or degree or extent 80% similar → incommensurate

to the degree or extent that 50% similar → insofar