Amazon KDP formatting is strict about interior dimensions. Any deviation in your KDP format causes a preflight error during upload. Here are the exact book formatting specifications you need.
5x8 KDP Format Interior Dimensions
According to Amazon KDP Print Setup formatting guidelines:
- Exact size: 5.00 inches wide × 8.00 inches tall
- With bleed: 5.125 inches × 8.25 inches
- Orientation: Portrait only (landscape not allowed for this trim)
- Hardcover: NOT available for 5x8 (nearest option is 5.5x8.5)
6x9 Interior Dimensions
- Exact size: 6.00 inches wide × 9.00 inches tall
- With bleed: 6.125 inches × 9.25 inches
- Orientation: Portrait only
- Hardcover: Available (75-550 pages)
6x9 is Amazon's most popular trim size for trade paperbacks.
Why Exact Dimensions Matter
KDP's automated system checks your PDF dimensions during upload. If your interior is 5.01 inches instead of 5.00 inches, it will be rejected. There's no tolerance for error.
Setting Up Your Document
In Microsoft Word or your design software:
- Set custom page size to exactly 5x8 or 6x9
- Don't use "Letter" or "A4" and try to adjust—start with the correct dimensions
- Export to PDF with "actual size" (not "fit to page")
- Verify PDF dimensions before uploading
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