How many letters does the top answer for “capable of being measured; measurable.” have?

The most common answer is mensurable (10 letters).

Crossword clue: capable of being measured; measurable.

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

mensurable 10 letters web-def

capable of being measured

capable of being measured 75% similar → measurable, mensurable

capable of being measured by a common standard 50% similar → commensurable