How many letters does the top answer for “the quality of being composed of relatively large particles” have?

The most common answer is graininess (10 letters).

Crossword clue: the quality of being composed of relatively large particles

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

graininess 10 letters wn-def

the quality of being composed of relatively large particles

granularity 11 letters wn-def

the quality of being composed of relatively large particles