--- title: "Journal and planner interior specs: trim, gutter, bleed | Once Books" description: "The numbers a journal or planner interior must hit at KDP, Lulu or IngramSpark: trim sizes, the gutter by page count, safe area, bleed and even page counts." source: "https://www.oncebooks.com/blog/journal-and-planner-interior-specs" --- 1. [Home](https://www.oncebooks.com/) 2. [Blog](https://www.oncebooks.com/blog) 3. Journal and planner interior specs: trim, gutter, bleed Blog # Journal and planner interior specs: trim, gutter, bleed [The Once Books team](https://www.oncebooks.com/authors/team) · 22 September 2026 · 7 min read - [kdp](https://www.oncebooks.com/blog/tag/kdp) - [journal](https://www.oncebooks.com/blog/tag/journal) - [planner](https://www.oncebooks.com/blog/tag/planner) - [print](https://www.oncebooks.com/blog/tag/print) - [low-content publishing](https://www.oncebooks.com/blog/tag/low-content-publishing) Most journals and planners that fail print review fail on geometry, not on content. The ruling is fine. A line reaches into the margin, or the gutter is sized for a shorter book, or a month [spread](https://www.oncebooks.com/glossary#spread) lands across a page turn. These are all numbers, and they are all knowable in advance. Here is the set that matters for a low-content interior, in the order a print service checks them. The numbers are KDP's, which are the strictest in wide use; Lulu, IngramSpark and Gelato publish their own and they are close. The studio lays the page out to the service you pick in the export step (Amazon KDP or Gelato today), and the same PDF uploads anywhere else. ## Trim size Pick the trim first; every other number depends on it. Two sizes cover almost every journal and planner: | Trim | Suits | Why | | --- | --- | --- | | 6 x 9 in | Lined and [dot grid](https://www.oncebooks.com/glossary#dot-grid) journals, guided journals | The cheapest per-page print cost; fits a bag; the category standard | | 8.5 x 11 in | Planners, daily pages with a schedule, Cornell | Room for seven day columns or a 6am to 9pm timeline | | 5 x 8 in | Pocket notebooks | The smallest trim with full distribution | | 8.25 x 11 in | Large print anything | KDP's own large-print size | Every one of these is a standard paperback trim at KDP, Lulu and IngramSpark. An odd custom size prints at KDP, but sells only on Amazon. ## Margins and the gutter KDP's rule for a no-bleed interior is 0.25 inches on the outside, top and bottom, and a [gutter](https://www.oncebooks.com/glossary#gutter-margin) on the binding edge that grows with the page count: | Pages | Gutter | | --- | --- | | 24 to 150 | 0.375 in | | 151 to 300 | 0.5 in | | 301 to 500 | 0.625 in | | 501 to 700 | 0.75 in | | 701 to 828 | 0.875 in | Two consequences follow. First, the page count must be fixed before the interior is laid out, because a book that grows from 148 to 152 pages needs every page re-laid with a wider gutter. Second, the gutter swaps sides: it is on the right of a left-hand page and the left of a right-hand page. A ruling laid out from the paper edge shifts by the gutter width on every other leaf. Lay it out from the trim instead, inset by the larger of the two margins on both sides, so a left page and a right page read the same. The studio does both from the compiled page count, and adds KDP's own text safety pull-in of 0.0625 inches so a descender never lands on a cut. ## The safe area, and the one thing KDP's previewer rejects On a no-bleed interior, any ink outside the margins is flagged as "content outside the safe area" and the upload is blocked. This is the most common rejection for a journal, and the causes are always the same: - a ruling that runs from paper edge to paper edge - a header band with a background fill that touches the top of the page - a decorative border drawn around the page - a corner ornament that pokes past the margin line Every rule, band, box and ornament has to end inside the margin. Our engine treats that as a test: every page type, in every theme, on four trims, bled and unbled, on both leaves, is checked so that nothing it draws lands outside the safe area. That is the low-content equivalent of a puzzle book's "every puzzle has one solution". ## Rule weight and colour Print-on-demand presses print in black ink and cannot hold a very light line. The numbers that survive: - **Weight:** at least 0.5 pt. Ours are 0.6 pt for lines and 0.9 pt dots. - **Darkness:** at least 30 percent black. A 15 percent grey hairline prints as nothing or as a dotted line. - **Spacing:** college rule 7.1 mm, wide rule 8.7 mm, dot and graph grids at 5 mm, handwriting groups at 16 mm. Snap the ruling to the writing area. A page where the last rule sits a random 3 mm above the bottom margin looks wrong to a buyer who cannot say why. Compute the number of rules that fit, centre the remainder, and the last rule lands on the line. ## Bleed A journal needs no [bleed](https://www.oncebooks.com/glossary#bleed) unless something prints to the edge. Edge tabs on a planner, a full-page tint, a header band that runs to the paper edge: those need a bled interior, and the file must extend 0.125 inches past the trim on the outside, top and bottom edges (KDP never bleeds the binding edge). With bleed on, the margins tighten to 0.375 inches outside and top and bottom. If you are not printing to the edge, leave bleed off. It only makes the safe area smaller. ## Even pages and spreads A bound book has an even number of pages, so an interior with 151 pages binds as 152 and KDP adds a blank at the back. Better to control that blank yourself: end on a notes page, not an empty one. Spreads are the planner-specific rule. A month across two pages, or a week across two, only works when the left half is on a left-hand page. Odd page numbers are on the right. So if the recipe would place a month spread on page 5, the two halves are split by a page turn and the buyer sees half a month at a time. The fix is a filler page before the spread so it opens on page 6. The studio's compiler inserts that notes page wherever it is needed and reports it in the preview, so a [weekly planner](https://www.oncebooks.com/planner/weekly-planner) never lands a spread across a turn. ## Resolution and the file Every print service asks for 300 DPI. A vector interior has no resolution as such: a rule is a line, not pixels, so it prints sharp at any size. The exported PDF from Publisher Studio is vector throughout, with the page box set to the trim (or the trim plus bleed), which is the one thing no on-screen check can catch and the one thing KDP measures first. ## The checklist 1. Trim chosen: 6 by 9 for journals, 8.5 by 11 for planners. 2. Page count fixed, even, inside 24 to 828. 3. Gutter sized to the page count, swapped per leaf, ruling centred on the trim. 4. Nothing outside the safe area on a no-bleed interior. 5. Rules 0.5 pt or more, 30 percent black or more, snapped to the writing area. 6. Bleed off unless printing to the edge. 7. Every spread opening on a left-hand page. The [journal maker](https://www.oncebooks.com/journal-maker) and the [planner maker](https://www.oncebooks.com/planner-maker) apply all seven from the page count you set, and the free [lined paper generator](https://www.oncebooks.com/tools/lined-paper-generator) prints one page laid out by the same rules so you can check the ruling on paper first. ## Try the tool Free, in your browser, no sign-up. Make one, then build the whole book in the studio. [Lined paper generator Lined, dot grid, graph or a guided journal page, printed in one click. Free, no sign-up. Try it free](https://www.oncebooks.com/tools/lined-paper-generator) ## Questions parents ask **What size should a journal be?** 6 by 9 inches is the most common journal trim and the cheapest to print. 8.5 by 11 suits planners and anything with a timed schedule. Both are standard paperback sizes at KDP, Lulu and IngramSpark. **How wide does the gutter need to be?** It depends on the page count: 0.375 inches up to 150 pages, 0.5 inches from 151 to 300, 0.625 inches from 301 to 500, and 0.75 inches above that. The outside, top and bottom margins are 0.25 inches without bleed. **Do journals need bleed?** No, unless something prints to the page edge. A ruled page with white margins needs no bleed. Edge tabs and full-page tints do, and then the interior must extend 0.125 inches past the trim on the three outer edges. ## Related reading - [How to make and sell planners on Amazon KDP](https://www.oncebooks.com/blog/how-to-make-and-sell-planners-on-kdp) — A practical 2026 guide to publishing daily, weekly and monthly planners on Amazon KDP and Etsy: dated versus undated, page counts, interior rules and covers. - [Journal niches that sell on KDP](https://www.oncebooks.com/blog/journal-niches-that-sell) — Over 70 journal niche ideas for KDP and Etsy, grouped by ruling and audience, plus how to pick a niche and check demand on Amazon first. - [Planner niches that sell on KDP](https://www.oncebooks.com/blog/planner-niches-that-sell) — Over 70 planner niche ideas for KDP and Etsy, grouped by audience and layout, plus how to pick a niche and check demand on Amazon first. ## 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 [Lined paper generator Lined, dot grid, graph or a guided journal page, printed in one click. Free, no sign-up. Try it free](https://www.oncebooks.com/tools/lined-paper-generator)