Your manuscript is finished. Your cover looks professional. Now comes the part most indie authors underestimate: print book formatting. Get it wrong, and readers notice. Get it right, and your book feels like a traditionally published product.
Poor formatting leads to rejected interior files from print-on-demand services, awkward page breaks, orphaned lines, and a reading experience that feels amateur. This guide gives you specific, actionable steps to format your print book like a pro—even if you’ve never done it before.
Choose the Right Page Size and Margins
Page size and margins are the foundation of your book’s interior. Choose wrong, and you’ll fight with spacing issues throughout the entire project.
Standard trim sizes by genre:
- Fiction: 5.5″ x 8.5″ (most common)
- Nonfiction/Manuals: 6″ x 9″ (more white space for notes)
- Children’s picture books: 8.5″ x 8.5″ or 11″ x 8.5″
- Poetry: 5.5″ x 8.5″ or 6″ x 9″
Minimum margin requirements:
- Interior margins: At least 0.5″ on all sides (0.75″ is safer for binding)
- For perfect-bound books (softcover), increase inside margins to 0.75″ to account for the gutter
Case study: Author J. Doe initially set margins at 0.5″ for a 300-page novel. When printed, text bled into the spine area, making the inner margin unreadable. After switching to 0.75″ interior margins, the book became readable and passed KDP’s interior review on the first try.
Tools to check: Most word processors let you set custom margins. In Microsoft Word, go to Layout > Margins > Custom Margins. For IngramSpark, their template generator automatically creates files with correct dimensions.
Select Professional Typography
Font choice affects readability and signals quality to readers. Your font choices should disappear—readers shouldn’t notice them.
Recommended fonts for body text:
- Garamond (classic, easy to read)
- Caslon (older style, good for historical fiction)
- Georgia (screen-friendly, works for nonfiction)
- Palatino (elegant, popular for literary fiction)
Font sizes:
- Body text: 11-12pt for standard trim sizes
- Nonfiction with dense content: 11pt
- Fiction: 11-12pt
- Large print editions: 14pt
Key typography rules:
- Use one font family throughout (e.g., Garamond for body, Bold Garamond for headings)
- Avoid more than two font styles total
- Line spacing: 1.15 to 1.5 for comfortable reading
- Never use Comic Sans, Papyrus, or default Word fonts like Arial in your body text
Example: A romance author used Arial for her 80,000-word novel because “it’s clean.” Readers complained about eye strain. Switching to Garamond 11pt with 1.2 line spacing reduced page count by only 8 pages but dramatically improved readability—and reviews reflected that change.
Design Consistent Chapter Headings and Section Breaks
Chapter headings are your book’s visual landmarks. Consistent styling helps readers navigate and creates professional polish.
Chapter heading best practices:
- Center or left-align consistently (pick one and stick with it)
- Use 14-18pt font, bold or small caps
- Add white space: 2-3 lines before chapter titles, 1-2 after
- Consider drop caps for the first paragraph (but test print—sometimes they break)
Section breaks within chapters:
- Use simple symbols: asterisks (*), ornamental dividers, or extra white space
- Avoid using extra line breaks as section breaks (inconsistent and hard to see in print)
- Keep section breaks consistent throughout the entire book
Common mistake: Authors insert extra paragraph breaks between sections, creating “rivers” of white space that look uneven. Use proper section break markers instead.
Handle Images and Graphics Properly
Images often cause formatting nightmares. They appear fine on screen but print blurry, too dark, or in the wrong position.
Image requirements for print:
- Resolution: 300 DPI minimum (600 DPI for line art)
- Format: TIFF or high-resolution PNG (JPEG with maximum quality works but can compress)
- Color mode: CMYK (RGB images may shift colors when printed)
Placement rules:
- Images should not break across pages
- Leave at least 0.25″ buffer around images
- Don’t place images too close to the spine (they may get lost in the gutter)
Case study: A cookbook author inserted 72 DPI web images into her manuscript. The printed photos appeared pixelated and faded. After replacing all images with 300 DPI versions and converting from RGB to CMYK, her book passed IngramSpark’s technical review and looked professional.
Tip: Test print a single page with your images before formatting the entire book. If it looks bad on paper, it will look bad in the final product.
Master Page Layout and Flow
Page layout determines how text flows from page to page. Poor layout creates widows, orphans, and awkward breaks.
Essential page layout rules:
- Widows: Single line at the bottom of a page (avoid by adjusting spacing)
- Orphans: Single line at the top of a page (avoid by adjusting spacing)
- Keep lines together: Prevent headings from separated from the following paragraph
- Keep paragraphs together: Don’t leave a paragraph’s last line alone on a page
How to fix in Word:
- Use “Keep with Next” for headings and chapter titles
- Use “Keep Lines Together” for paragraphs you want unbroken
- Use “Widow/Orphan Control” in paragraph settings (automatically fixes most issues)
Technical note: Most print-on-demand services require you to submit a print-ready PDF, not the source file. Export from your word processor using “Save as PDF” with high-quality settings. Check “ISO 19500-1 compliant” if available.
Test and Proof Your Interior File
Never submit a file without printing a physical proof. Screen previewing hides many print issues.
Proofreading checklist:
- Print one full copy on standard paper before ordering proofs
- Check that chapter titles don’t appear alone at the bottom of a page
- Verify page numbers are consecutive and correct
- Confirm that headers/footers (if used) appear on every page except the first of a chapter
- Look for stray hyphens or awkward line breaks
- Test that images print clearly and at correct sizes
Services for professional review:
- Draft2Digital’s Interior Review Tool (free for files under 500 pages)
- Reedsy’s formatting services (paid but handles complex books)
- Your local print shop can print a single copy for $5-15
Case study: An indie author skipped physical proofs and ordered 500 copies of his thriller. Forty books had a page numbering error starting in Chapter 12. He lost $800 in wasted inventory. The $12 proof print would have caught this.
Key Takeaways
- Choose standard trim sizes (5.5″ x 8.5″ for fiction) with 0.75″ interior margins
- Use professional fonts like Garamond or Georgia at 11-12pt with 1.15-1.5 line spacing
- Keep chapter headings consistent and use proper section break markers
- Ensure images are 300 DPI minimum, CMYK color mode, and properly buffered
- Enable widow/orphan control and use “Keep with Next” for headings
- Always print a physical proof before uploading to POD services
Next Steps
- Download a template from your target POD service (KDP, IngramSpark, or Draft2Digital) before formatting
- Run a test print at home or a local print shop to catch issues early
- Export your final file as PDF with high-quality settings, not as a Word doc
- Upload and order a proof from your POD service—review it carefully before publishing
- Fix any issues and re-upload; formatting is never “set it and forget it”
Your readers judge your book by its interior as much as its cover. These formatting tips ensure your print book looks professional, reads smoothly, and builds trust with every reader who holds it in their hands.
