6" × 9" Trim Size Guide
A common trade size for nonfiction and longer manuscripts. Compare margins, page-count scenarios, spine math, typography, and platform-specific production checks.
A roomy, widely supported trade size
At 6" × 9", the page has room for nonfiction structures such as subheads, lists, figures, and tables. It is also used for literary fiction and long novels, though a smaller trade size may better match some genre shelves.
The larger page feels more substantial in hand than a 5.5" × 8.5" trade paperback and can reduce page count when the design is adjusted well. That does not guarantee a cheaper or better book: type size, line length, margins, figures, chapter openings, and the printer's current rates all affect the result.
Test this trim with the manuscript's hardest pages and compare it against 5.5" × 8.5". The right choice is the one that gives the target reader a comfortable text block, handles special content cleanly, and produces acceptable physical and economic tradeoffs.
KDP margin requirements
Minimum inside (gutter) margin
KDP sets the minimum inside margin based on page count. The gutter must be wide enough for the binding to hold without cutting into the text. These are minimums — professional formatters use wider margins for better readability.
| Page Count | Minimum Inside Margin |
|---|---|
| 24–150 pages | 0.375" |
| 151–300 pages | 0.5" |
| 301–500 pages | 0.625" |
| 501–700 pages | 0.75" |
| 701–828 pages | 0.875" |
Minimum outside margins
KDP requires a minimum of 0.25" on the outside, top, and bottom edges for books without bleed. With bleed enabled, the minimum increases to 0.375".
Recommended margins
KDP minimums will pass validation, but they produce tight, uncomfortable pages. Use these professional margins for a polished interior:
| Edge | Recommended Range |
|---|---|
| Inside (gutter) | 0.75"–0.9" |
| Outside | 0.6"–0.75" |
| Top | 0.7"–0.8" |
| Bottom | 0.8"–0.9" |
Word count to page count
These estimates assume standard formatting: 11–12pt body text, 1.35–1.5× line spacing, professional margins, and typical front/back matter. Your actual count depends on font, spacing, and chapter structure.
| Word Count | Estimated Pages |
|---|---|
| 50,000 words | ~155 pages |
| 60,000 words | ~185 pages |
| 70,000 words | ~215 pages |
| 80,000 words | ~230 pages |
| 90,000 words | ~265 pages |
| 100,000 words | ~295 pages |
| 120,000 words | ~350 pages |
| 150,000 words | ~440 pages |
Use the KDP Book Calculator for early planning. Import the manuscript into Cambric to see the composed page count, then use the final exported PDF count for pricing and cover-template decisions.
Spine width calculation
Your spine width determines whether your cover designer can put text on the spine, and it is required for building the full cover template. KDP calculates spine width from your page count and paper type:
Cream paper (standard for fiction)
Spine width = page count × 0.0025"
A 230-page book on cream paper: 230 × 0.0025 = 0.575"
White paper (standard for nonfiction)
Spine width = page count × 0.002252"
A 230-page book on white paper: 230 × 0.002252 = 0.518"
KDP requires at least 79 pages before allowing paperback spine text, with text kept at least 0.0625" from either side of the spine. Do not add an arbitrary allowance to the calculated spine: use KDP's official cover calculator after the interior page count and paper are final.
Font and spacing recommendations
The 6" × 9" page provides a wider text block than smaller trims, which changes how typefaces behave. A line that runs roughly 4.5"–4.8" wide (after margins) needs a typeface that reads comfortably at that measure.
Body text
- Size: 11–12pt. Nonfiction typically runs at 11pt; fiction at 11.5–12pt.
- Leading: 1.35–1.5× the font size. At 11pt, that means 14.85–16.5pt leading.
- Fonts: Wider typefaces like Palatino, Garamond, Minion Pro, and Caslon work well at this trim size. They fill the line without feeling stretched.
- Avoid: Narrow or condensed fonts. At a 4.5"+ line width, condensed faces create too many words per line and reduce readability.
Browse typeface options in our Book Fonts tool to preview how different faces look at 6" × 9". Cambric includes built-in support for all these typefaces.
When to choose 6" × 9"
Good fit
- Nonfiction: Self-help, business, history, biography, science, how-to. This is the default size readers and bookstores expect.
- Long fiction: Epic fantasy, science fiction, and literary novels over 100,000 words. Keeps page count and cost manageable.
- Literary fiction: Even at shorter lengths, 6" × 9" signals a serious, shelf-worthy book.
- Books with wider content: Tables, code listings, sidebars, and block quotes benefit from the extra page width.
Consider alternatives
- Genre romance: Readers expect a smaller, more portable size. Use 5.5" × 8.5" or 5" × 8" instead.
- Mass-market feel: If you want your book to feel like a traditional pocket paperback, 6" × 9" is too large. Go with 5" × 8".
- Short books under 40,000 words: At 6" × 9", a short book produces very few pages and can feel thin. A smaller trim fills more pages and feels more substantial.
For a side-by-side comparison of all sizes, see the Trim Size Guide. For a detailed walkthrough of choosing your trim, read KDP Trim Sizes Explained.
Related guides
- How to Format a Book for KDP — Complete formatting walkthrough from manuscript to upload.
- How to Format a Nonfiction Book for Print — Nonfiction-specific formatting, including front matter, headings, and layout.
- KDP Trim Sizes Explained — A comparison of every KDP trim size with genre recommendations.
- KDP Book Calculator — Enter your word count and see pages, spine, cost, and royalty.
- 5.5" × 8.5" Trim Size Guide — The most popular alternative trim for fiction.
FAQ
Is 6x9 too big for fiction?
What is the minimum page count for a 6x9 book on KDP?
Should I use cream or white paper for a 6x9 book?
How does 6x9 compare to 5.5x8.5 for printing cost?
What fonts work best at 6x9?
Know your trim size?
Format the book.
Cambric lets you preview the manuscript as 6" × 9" book pages, inspect difficult spreads, and export the interior PDF. Use the final page count to generate the printer's platform-specific cover template, then validate and proof the uploaded edition.