Size Duel deck / Sport and everyday things
Basketball (size 7)
Length: diameter (from the 74.9–78 cm circumference)
about 24.2 cm (9.53 in)
Range used for fair duels: 23.8 cm to 24.8 cm.
Only about 2 cm wider than a football.
Sources and checks
Checked 2026-10-19: Claude (AI build agent): Wikidata statement compared, second-source quote verified in the fetched page. Quotes are short passages from each source, in their original language.
Wikidata P2386: 24.19 centimetreQ810345, CC0, retrieved 2026-10-19
“Ballen har en omkrets på 74,9–78 centimeter”Store norske leksikon (in Norwegian): source, retrieved 2026-10-19“circonferenza che varia da 75 a 78 cm”Treccani Enciclopedia online (in Italian): source, retrieved 2026-10-19
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