How many letters does the top answer for “any material used especially to protect something” have?

The most common answer is packing (7 letters).

Crossword clue: any material used especially to protect something

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

packing 7 letters wn-def

any material used especially to protect something

wadding 7 letters wn-def

any material used especially to protect something