Size Duel deck / Sport, food and everyday things
A3 sheet of paper
Sources and checks
Checked 2026-11-01: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify, or content-verify-pdf for PDFs); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source.
“297 mm x 420 mm”Canon: source, retrieved 2026-10-27; quote found in the PDF’s text by content-verify-pdf
“297 × 420 mm”Epson: source, retrieved 2026-10-27; quote re-found by the server check
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