--- title: "KDP word search interior specs: trim, margins and gutter | Once Books" description: "The trim sizes, margins, gutter and bleed a KDP word search interior needs to pass review, with the large-print numbers that actually sell." source: "https://www.oncebooks.com/blog/kdp-word-search-interior-specs" --- 1. [Home](https://www.oncebooks.com/) 2. [Blog](https://www.oncebooks.com/blog) 3. KDP word search interior specs: trim, margins and gutter Blog # KDP word search interior specs: trim, margins and gutter [The Once Books team](https://www.oncebooks.com/authors/team) · 14 September 2026 · 6 min read - [kdp](https://www.oncebooks.com/blog/tag/kdp) - [word search](https://www.oncebooks.com/blog/tag/word-search) - [print](https://www.oncebooks.com/blog/tag/print) Most first word search books that fail KDP review fail on the interior, not the content. The puzzles are fine; the page geometry is wrong. Getting the trim, margins, gutter and resolution right the first time is mostly a matter of knowing the numbers, so here's the set that matters most in this niche. KDP updates its guidance from time to time, so treat these as the working numbers and check the current KDP help pages before a big run. ## Trim size The [trim size](https://www.oncebooks.com/glossary#kdp-trim-size) is the finished page dimension. For word search, the deciding factor is how readable the grid is, and that's the whole selling point in the largest sub-niche, large print. - **8.5 by 11 inches**: the default for large-print word search. Room for a big grid and a generous word list. - **8 by 10 inches**: slightly more compact, still very readable, a little cheaper to print. - **6 by 9 inches**: fine for a compact or travel book, but the grid gets tight. Not the first choice for a large-print title. Pick one trim and design the whole interior to it. The studio exports any KDP trim from the same project, so you can produce a large-print and a standard edition from one generation. ## Margins Margins are the white space between your content and the page edge. KDP sets a minimum, but puzzles want more breathing room than dense text does. - **Outside, top and bottom**: at least 0.25 inch. For puzzles, 0.5 inch reads better and keeps the grid clear of the trim. - **Inside (the gutter)**: this is the margin nearest the spine, and it must grow with page count so the binding does not swallow the grid. ## Gutter by page count The [gutter margin](https://www.oncebooks.com/glossary#gutter-margin) is the single spec people most often get wrong. A thick book needs a wider inside margin because more pages curve into the spine. As a working guide: - Up to 150 pages: about 0.375 inch - 151 to 300 pages: about 0.5 inch - 301 to 500 pages: about 0.625 inch - 501 to 700 pages: about 0.75 inch A generated interior sizes the gutter for your page count automatically, so you don't have to redo the layout every time the book grows. ## Bleed [Bleed](https://www.oncebooks.com/glossary#bleed) is the small overrun (0.125 inch) past the trim that lets colour or art print right to the edge after cutting. A plain word search interior with white margins needs no bleed. Add it only if a puzzle page carries a full-bleed background or a decorative border that touches the edge, and then extend that art 0.125 inch beyond the trim on every outside side. Don't add bleed "just in case". If your content doesn't reach the page edge, a bleed setting only shifts your safe area and can trip a review warning. No edge art means no bleed. ## Resolution and the file itself - **300 DPI**: the print standard. Grids and answer shading must render crisply at the finished size, not just on screen. - **A [print-ready](https://www.oncebooks.com/glossary#print-ready) PDF**: fonts embedded, one page per book page, at the exact trim (plus bleed only if used). - **Black and white**: word search interiors are almost always black-and-white, which prints far cheaper per page than colour and reads perfectly for puzzles. The [KDP word-search maker](https://www.oncebooks.com/kdp-word-search-maker) exports a print-ready 300 DPI [interior PDF](https://www.oncebooks.com/glossary#interior-pdf) and a separate answer-key PDF at whichever trim you choose, with these margins and gutter already applied. If you want to see the output before committing, the [free generator](https://www.oncebooks.com/tools/word-search-generator) prints a single puzzle and [answer key](https://www.oncebooks.com/glossary#answer-key) at a large-print size. ## The short checklist Before you upload: one trim throughout, at least a 0.25 inch outside margin, a gutter sized to your page count, bleed only if art reaches the edge, 300 DPI, and a matching answer key for every puzzle. Get those right and the interior clears review. For the rest of the path, see the full guide to [making and selling word search books on KDP](https://www.oncebooks.com/blog/how-to-make-and-sell-word-search-books-on-kdp). ## Try the tool Free, in your browser, no sign-up. Make one, then build the whole book in the studio. [Word search generator Type your words and print a puzzle plus its answer key. Free, no sign-up. Try it free](https://www.oncebooks.com/tools/word-search-generator) ## Questions parents ask **What size should a KDP word search book be?** For large print, 8.5 by 11 inches is the most common and buyer-friendly trim, with 8 by 10 a close second. Smaller trims like 6 by 9 work for compact or travel books but leave less room for a readable grid. **What are the margins and gutter for a KDP puzzle book?** Keep at least a 0.25 inch outside margin (more is safer for puzzles), and set the inside gutter by page count: about 0.375 inch up to 150 pages, 0.5 inch from 151 to 300 pages, and larger above that. **Do word search interiors need bleed?** Only if something is meant to print to the very edge of the page. Most word search interiors sit inside white margins and need no bleed. If you add a full-page background, extend it 0.125 inch past the trim on every outside edge. ## Related reading - [KDP spine width and cover size: the exact formula](https://www.oncebooks.com/blog/kdp-cover-size-and-spine-width) — How to calculate KDP spine width and full-wrap cover size: the per-page paper multipliers, the bleed maths, three worked examples and the common mistakes. - [KDP sudoku interior specs: trims, margins and solutions](https://www.oncebooks.com/blog/kdp-sudoku-interior-specs) — The trim sizes, margins, gutter, bleed and solutions layout a KDP sudoku interior needs to pass review, with the large-print grid numbers that sell. - [How to publish a paperback on KDP: the checklist](https://www.oncebooks.com/blog/kdp-paperback-publishing-checklist) — The ordered checklist for publishing a paperback on Amazon KDP: trim, paper, page count, interior and cover PDFs, metadata, pricing, proof and review. ## Keep reading - [Answers](https://www.oncebooks.com/answers) — One sharply-scoped question per page, cost, safety, timing, printing, answered in a couple of sentences before the detail. - [Glossary](https://www.oncebooks.com/glossary) — Plain definitions of the vocabulary: the Character Sheet, the Consistency Engine, style profiles, drift. - [Help centre](https://www.oncebooks.com/help) — Task-shaped instructions for making, printing and sharing a book once you have started one. [← All posts](https://www.oncebooks.com/blog) Try this tool [Word search generator Type your words and print a puzzle plus its answer key. Free, no sign-up. Try it free](https://www.oncebooks.com/tools/word-search-generator)