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Print on demandKDP

What size is a book (6×9 and the rest)

You pick trim in the workshop. The PDF must match what you set on KDP.

In the US the most common paperback is 6×9 inches. There is also pocket, digest, square, landscape. KDP help is blunt: file size and title-setup size must match.

Set it on Path A, B, or C. Do not hand-crop “almost 6×9” in Word.