Duodecimo is a book size where each page measures approximately 4.5 inches by 7.5 inches, or 115 mm by 190 mm. This size is achieved by folding a standard sheet of paper into twelve sections, resulting in a compact format with 24 pages per folded sheet. Duodecimo is commonly used for smaller books such as pocket-sized novels, classic literature, and reference materials, offering a convenient size for portability and ease of reading.

英語での「duodecimo」の定義と意味

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