Size Duel deck / The body, cells and particles
Human brain
Mass: adult
about 1.35 kg (2.98 lb)
Range used for fair duels: 1.2 kg to 1.5 kg.
About 2% of an adult’s body mass.
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.
“1,3–1,5 kilo”Store medisinske leksikon (in Norwegian): source, retrieved 2026-10-21; quote re-found by the server check“1200 and 1400 grams”Anatomy Atlases, Bergman, Afifi and Miyauchi: source, retrieved 2026-10-21; quote re-found by the server check
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