How many letters does the top answer for “pertaining to or having finely developed buttocks” have?

The most common answer is callipygian (11 letters).

Crossword clue: pertaining to or having finely developed buttocks

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

callipygian 11 letters wn-def

pertaining to or having finely developed buttocks

callipygous 11 letters wn-def

pertaining to or having finely developed buttocks