How many letters does the top answer for “any of several games played with small rectangular blocks” have?

The most common answer is dominoes (8 letters).

Crossword clue: any of several games played with small rectangular blocks

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

dominoes 8 letters wn-def

any of several games played with small rectangular blocks

dominos 7 letters wn-def

any of several games played with small rectangular blocks