A-format refers to a standard size for paperback books, typically measuring around 4.33 inches by 7 inches, or 110 mm by 178 mm. This smaller size is commonly used for mass-market paperbacks, making them portable and easy to hold. A-format books are often printed in large quantities and are usually less expensive, making them a popular choice for novels and other general fiction titles. The compact size allows for convenience in transportation and storage while maintaining a readable text layout.

英語での「A-format」の定義と意味

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