Fantasy Novel KDP Formatting: UK Author's Guide
Self-publishing a fantasy on Amazon KDP requires layout decisions specific to the genre — decisions that affect spine math, royalty per copy, reader experience, and (most importantly) whether your file clears KDP's automated review on the first attempt. This guide gives the formatting recipe most fantasy authors should follow, plus the specific pitfall the genre is most likely to trip over.
TL;DR — the Fantasy formatting recipe
- Trim: 6" x 9" (industry standard for trade fantasy)
- Paper: Cream
- Body font: Garamond, Sabon or Adobe Caslon Pro at 11-12pt
- Chapter heading font: Display serif (Cinzel, Trajan Pro) or strong italics at 22-28pt
- Spacing: 1.3 spacing, justified, with 0.3-0.35" first-line indent
- Typical page count: 350-550 pages (epic fantasy frequently 600-900)
Why these defaults are the right starting point
The 6" x 9" trim is the fantasy industry standard for a reason — it's what trad-published fantasy books use, so it's what readers expect to feel in their hands. Deviating from the genre standard isn't always wrong, but it's a deliberate decision that needs a reason: maybe you're producing a limited-run hardcover with a different feel, or your book has unusual layout requirements. For 95% of authors in fantasy, the standard trim wins.
The paper choice — Cream — affects the reader's perception of the book as much as any cover decision. Cream paper for fantasy works because [it matches what readers expect: more readable for long-form prose, less harsh on the eye in cream; sharper and brighter for technical or visual content in white].
The Fantasy-specific pitfall
Long fantasy novels push past 450 pages routinely. The 0.875" gutter that's required at 600+ pages is brutal if you didn't plan for it — text on the right page disappears into the binding. Plan the gutter before laying out the manuscript, not after.
Layout notes for fantasy books
Maps, family trees and glossaries are common in fantasy and each one needs deliberate decisions. Maps should be embedded at 300 DPI minimum, ideally drawn for the trim size (a map made for screen renders muddy at print resolution). Drop caps at chapter openings work beautifully in fantasy but only if your title page hierarchy supports them — small caps for the first three words after the drop is a classic move. POV section breaks should use a consistent ornament (★, ✦, fleuron) — and that ornament must be embedded as a font glyph, not pasted as an image.
How Fantasy formatting affects your spine width
Your spine width is determined by page count × paper thickness. At KDP's standard rates:
| Page count | Spine width (cream) | Spine width (white) |
|---|---|---|
| 100 pages | 0.250" (6.4 mm) | 0.225" (5.7 mm) |
| 200 pages | 0.500" (12.7 mm) | 0.450" (11.4 mm) |
| 450 pages (typical fantasy) | 1.125" (28.6 mm) | 1.013" (25.7 mm) |
| 400 pages | 1.000" (25.4 mm) | 0.901" (22.9 mm) |
| 600 pages | 1.500" (38.1 mm) | 1.351" (34.3 mm) |
Use the Spine Width Calculator for your exact page count once the manuscript is final.
Gutter (inside) margin by page count
KDP requires a wider gutter as page count grows — the spine of a thicker book swallows more of the page, so the text needs to start further from the binding. The minimum gutter values for fantasy books:
- Under 150 pages: 0.375" (9.5 mm) minimum
- 151-300 pages: 0.500" (12.7 mm) minimum
- 301-500 pages: 0.625" (15.9 mm) minimum
- 501-700 pages: 0.750" (19.1 mm) minimum
- 701-828 pages: 0.875" (22.2 mm) minimum
Most self-published fantasy authors should set the gutter at the next tier up from the minimum — readability beats squeezing a few extra words per line. Use the Margin Calculator to confirm the exact values for your trim and page count.
Pre-upload checklist for fantasy formatting
- Trim size in your document matches your chosen KDP trim exactly
- Mirror margins enabled (inside/outside, not left/right)
- Gutter set at or above the KDP minimum for your final page count
- Body font embedded — every glyph, including italics and bold variants
- Page count is even (add a blank page at the back if odd — KDP rejects odd page counts)
- Chapter starts use proper page breaks (not multiple Enter presses)
- Front matter (title, copyright, dedication, TOC) uses Roman numerals or no numbering
- Body pages number from 1 starting at the first chapter
- PDF exported as PDF/X-1a:2001 with "Embed All Fonts" enabled
- Fantasy-specific pitfall reviewed (see above)
A faster alternative: run your finished PDF through the free KDP Readiness Score and we'll check every item above in under a minute.
Cover guidance for fantasy books
Cover decisions are out of scope for this formatting guide, but two things matter at the formatting stage:
- Spine text minimum: KDP requires at least 79 pages (0.2" spine) before allowing spine text. Most fantasy books clear this comfortably.
- Spine text alignment: Your cover designer will need the final spine width in millimetres or inches once your manuscript is locked. Send them the exact page count + paper type + trim, and they'll calculate the spine.
The Cover Formatting Guide covers the wrap dimensions in detail.
Want us to format your fantasy for you?
Our formatting service handles the full fantasy formatting stack — trim, gutter, fonts, chapter openers, the fantasy-specific pitfalls described above — from £69 with unlimited revisions and a KDP-pass guarantee.
If you'd rather DIY, the Word to KDP Guide and the KDP Formatting Checklist cover the mechanics step by step.
You might also need
- Spine Width Calculator
- Margin Calculator
- KDP Trim Size Guide
- White vs Cream Paper
- How to Self-Publish a Book on Amazon UK
Further reading from official sources
- KDP — Paperback manuscript formatting — Amazon's official paperback formatting requirements.
- KDP — Paperback cover specifications — Amazon's official cover-spec sheet, including spine math.
Last reviewed by Robert Prime — 2026-05-17
