5.5" × 8.5" trim size
The trade paperback standard — hardcover eligible. Full-bleed cover: 5.750" × 8.750". Safe content area: 5.000" × 8.000". Hardcover eligible.
Dimensions reference
Exact specs for 5.5" × 8.5"
| Measurement | Inches | Pixels @300 DPI |
|---|---|---|
| Trim size | 5.5" × 8.5" | 1650 × 2550 |
| Full bleed (+ 0.125" each side) | 5.750" × 8.750" | 1725 × 2625 |
| Bleed margin | 0.125" per side | 38px per side |
| Safe margin | 0.25" per side | 75px per side |
| Safe content area | 5.000" × 8.000" | 1499 × 2399 |
Proportions at a glance
Who publishes in 5.5" × 8.5"?
Books that perform well in this format based on page area, reader convention, and printing economics.
Literary Fiction & Memoirs
The 5.5" × 8.5" trim is the trade paperback standard at independent bookshops. Memoirs and literary novels feel most at home here.
Poetry & Essay Collections
Essay collections and poetry volumes that aspire to press-quality presentation use this trim to signal seriousness of intent to literary readers.
Young Adult Fiction
YA novels published by traditional houses almost universally use 5.5" × 8.5". Self-publishing authors who want to match that shelf-level look should start here.
Mystery & Thriller (Premium)
Authors positioning their mystery or thriller above the mass-market tier — at $14.99+ — use this format to justify the higher price point with a premium feel.
Translated Literature
Translated fiction and international literary works follow the trade paperback convention almost universally. This size signals alignment with the global literary market.
Spine width reference
Spine widths for 5.5" × 8.5"
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 5.5" × 8.5"
Who publishes in this size
The 5.5" × 8.5" trim is the closest KDP equivalent to the trade paperback standard used by traditional publishers. It attracts authors who want their book to stand alongside traditionally published titles at the same shelf level — literally and figuratively. Literary fiction authors, memoirists, YA writers, and poets all reach for this format when they want their book to signal investment and quality. It is also the preferred choice for authors who intend to pursue bookshop distribution, as indie bookshops are accustomed to shelving trade paperbacks at this approximate size. The hardcover availability is a significant bonus: authors can offer a premium hardcover gift edition at $24.99+ while the paperback sells at $13.99–$16.99.
Design considerations for 5.5" × 8.5"
The 5.5" × 8.5" trim gives designers comfortable working space. A 6.25" wide full-bleed cover (before spine) allows for strong horizontal compositions, full-bleed photography, and typographic treatments that feel uncluttered. Interior design should prioritise legibility: 12pt body text, 1.4–1.5× line spacing, 0.75"–0.875" outer margins, and a 1" inner gutter for books under 400 pages (increase to 1.25" for thicker volumes). Chapter openings can carry a decorative drop-cap or ornament at this size without feeling precious. Running headers at the chapter title add a professional touch. The slightly larger page area compared to 5" × 8" means you can accommodate more generous white space — a key marker of quality book design.
Printing costs at this size
A 300-page 5.5" × 8.5" paperback costs approximately $4.85–$5.25 to print in black and white on KDP. Cream paper costs roughly $0.25–$0.40 more per book than white. At a $15.99 list price and 60% royalty, the author earns approximately $4.50–$5.00 per sale. The hardcover equivalent for 300 pages runs approximately $8.50–$9.50 to print, still viable at a $24.99 list price where the 60% royalty yields $15.00 gross before printing. For authors releasing both editions simultaneously, the hardcover often sells strongly in the first month to superfans, then the paperback becomes the steady long-tail revenue stream.
Readability at 5.5" × 8.5"
This format is particularly well-suited to extended reading because the page proportions match what readers have spent their lives holding. The 5.5" width allows for comfortable 60–70 character line lengths at 12pt — right in the typographer's optimal range. Page turns occur at a natural rhythm for books of 60,000–100,000 words, typically every few minutes, which maintains engagement without fatigue. For literary fiction where sentence construction is part of the aesthetic experience, the 5.5" × 8.5" format provides enough page space to let paragraphs breathe while still moving the eye efficiently down the page.
Questions about the 5.5" × 8.5" trim size
Build a print-ready cover for 5.5" × 8.5"
KDPEasy calculates exact bleed, spine width, and safe margins for the 5.5" × 8.5" trim automatically — no manual maths required.