KDP Print Formatting Guide: Trim Sizes, Bleed, Margins & Fonts

Most rejected KDP print files aren't rejected because of bad content — they're rejected because of formatting mistakes that are easy to avoid once you know the rules. This guide walks through the technical requirements that matter most for low-content books: trim size, bleed, margins, and fonts. Get these right and your file will sail through review.

Choosing a Trim Size

Trim size is the final page dimension after the book is cut. KDP supports a range of sizes, but for low-content books, a handful dominate for good reason: they match reader expectations and print costs stay predictable.

• 6 x 9 inches — the standard for journals, notebooks, and planners. Comfortable in hand, generous page space.
• 8.5 x 11 inches — common for workbooks, coloring books, and large-format planners where grid or activity space matters.
• 5 x 8 inches — a more compact, book-like feel for pocket journals or gift-style notebooks.

Once you pick a size, stick with it across your interior and cover files — mismatched dimensions are one of the most common causes of upload errors. If you're unsure which size fits your niche, the