Size Duel deck / Sport, food and everyday things
Baseball
Mass: regulation ball
about 145.5 g (5.13 oz)
Range used for fair duels: 142 g to 149 g.
Almost exactly the mass of a lacrosse ball.
Sources and checks
Checked 2026-10-21: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source, in their original language.
“142-149 g”Dimensions.com: source, retrieved 2026-10-21; quote re-found by the server check
“142–149 gram”Store norske leksikon (in Norwegian): source, retrieved 2026-10-21; quote re-found by the server checkSpotted a mistake? Tell us; a correction gets a new revision.