6" × 9" trim size
The most popular KDP trim size. Full-bleed cover: 6.250" × 9.250". Safe content area: 5.500" × 8.500". Hardcover eligible.
Dimensions reference
Exact specs for 6" × 9"
| Measurement | Inches | Pixels @300 DPI |
|---|---|---|
| Trim size | 6" × 9" | 1800 × 2700 |
| Full bleed (+ 0.125" each side) | 6.250" × 9.250" | 1875 × 2775 |
| Bleed margin | 0.125" per side | 38px per side |
| Safe margin | 0.25" per side | 75px per side |
| Safe content area | 5.500" × 8.500" | 1649 × 2549 |
Proportions at a glance
Who publishes in 6" × 9"?
Books that perform well in this format based on page area, reader convention, and printing economics.
Business & Self-Help
6" × 9" is the industry standard for business books, productivity guides, and self-help titles. Readers associate this size with authoritative non-fiction.
Memoirs & Biography
Narrative non-fiction — memoirs, biography, and true crime — reads naturally at 6" × 9". The page area supports longer passages without feeling cramped.
How-To & Reference
Instructional books, guides, and reference works benefit from the larger page area. Numbered lists, callout boxes, and sidebars all fit comfortably.
Academic & Educational
University presses and educational publishers default to 6" × 9" for academic monographs and textbooks intended for advanced readers.
Literary Fiction
Longer literary novels and multi-volume series benefit from 6" × 9" because the extra page area reduces page count, keeping thick books manageable.
Health & Wellness
Health guides, fitness books, and wellness journals use 6" × 9" to accommodate diagrams, charts, and structured exercise programmes.
Spine width reference
Spine widths for 6" × 9"
White paper: spine = (pages × 0.002252) + 0.06 in. Cream paper: spine = (pages × 0.0025) + 0.06 in. These values match KDP’s official spine width formulas.
| Page count | White paper | Cream paper |
|---|---|---|
| 50 pages | 0.173" | 0.185" |
| 100 pages | 0.285" | 0.310" |
| 200 pages | 0.510" | 0.560" |
| 400 pages | 0.961" | 1.060" |
Publishing guide
Publishing in 6" × 9"
Who publishes in this size
Six by nine is the undisputed king of KDP trim sizes. The vast majority of non-fiction books on Amazon — business, self-help, health, spirituality, cooking, parenting — are published in this format because it matches what readers expect from a "real" book. Business authors who want to establish authority in their field, coaches building a book-based marketing funnel, and non-fiction first-timers who want the safest possible choice all land here. Beyond non-fiction, longer novels (100,000+ words) that would produce an unwieldy page count at 5" × 8" move up to 6" × 9" to keep page count manageable. The hardcover eligibility is the final sell: authors can publish both paperback at $14.99 and hardcover at $24.99, capturing different customer segments with the same content.
Design considerations for 6" × 9"
The 6" × 9" format gives designers generous working space. Full-bleed photography, large title typography, and complex cover compositions all work well. Interior design should use 12pt body text minimum, with 1.3–1.5× line spacing for optimal readability. For non-fiction, consider a document-style layout: clear heading hierarchy (H1 chapter titles, H2 sections, H3 sub-sections), bulleted lists with consistent indent depth, and callout boxes in a tinted background to break up long prose passages. Tables and figures should be centred on the page and captioned consistently. Running headers with the book title and chapter name help readers orient themselves in longer works. For fiction, treat the extra page width as invitation for more breathing room rather than more text — use it for generous paragraph spacing and wider margins.
Printing costs at this size
A 300-page 6" × 9" paperback costs approximately $5.45–$5.95 in black and white on KDP. Cream paper adds about $0.30. At a $16.99 list price with 60% royalty, the author earns approximately $4.70–$5.20 per sale. The larger page means fewer pages for the same word count compared to smaller trims, which partially offsets the higher per-page cost. For non-fiction authors who can price at $19.99–$24.99, the margin is extremely attractive. Colour interior pages (for infographics, photographs) significantly increase printing costs and are typically reserved for books where visuals are central to the value proposition.
Readability at 6" × 9"
The 6" × 9" format produces line lengths of 65–75 characters at standard margins and 12pt text — at the upper end of the optimal typographic range. Experienced readers handle this comfortably; for audiences who may include less practised readers (children, ESL learners, older readers), consider increasing font size to 13–14pt or widening margins to shorten the lines. The page height is large enough to accommodate substantial paragraphs before a page turn, which helps maintain flow in dense non-fiction. Readers do not need to handle the book frequently to progress through the content — a valuable feature for books read at a desk or propped on a pillow.
Questions about the 6" × 9" trim size
Build a print-ready cover for 6" × 9"
KDPEasy calculates exact bleed, spine width, and safe margins for the 6" × 9" trim automatically — no manual maths required.