Size Duel deck / Sport and everyday things
Tennis ball
Mass: mass (rules allow 56.0–59.4 g)
about 57.6 g (2.03 oz)
Range used for fair duels: 56 g to 59.4 g.
About as heavy as a large hen’s egg.
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.
Wikidata P2067: 57.6 gramQ246514, CC0, retrieved 2026-10-19
“56.0-59.4 grams (1.975-2.095 ounces)”ITF Technical Booklet 2023 (Rules of Tennis, Appendix I): source, retrieved 2026-10-19, read with a web fetch
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