How many letters does the top answer for “an object (such as a coin or postage stamp) made to mark an event or honor a person” have?

The most common answer is commemorative (13 letters).

Crossword clue: an object (such as a coin or postage stamp) made to mark an event or honor a person

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

commemorative 13 letters wn-def

an object (such as a coin or postage stamp) made to mark an event or honor a person