--- title: "print · Blog | Once Books" description: "7 posts tagged “print” on the Once Books blog, newest first: KDP spine width and cover size: the exact formula." source: "https://www.oncebooks.com/blog/tag/print" --- 1. [Home](https://www.oncebooks.com/) 2. [Blog](https://www.oncebooks.com/blog) 3. print Topic # Print 7 posts on this topic. - [6 October 2026 · 7 min read](https://www.oncebooks.com/blog/kdp-cover-size-and-spine-width) — KDP spine width and cover size: the exact formula 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. - [3 October 2026 · 6 min read](https://www.oncebooks.com/blog/kdp-sudoku-interior-specs) — KDP sudoku interior specs: trims, margins and solutions 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. - [29 September 2026 · 9 min read](https://www.oncebooks.com/blog/kdp-paperback-publishing-checklist) — How to publish a paperback on KDP: the checklist The ordered checklist for publishing a paperback on Amazon KDP: trim, paper, page count, interior and cover PDFs, metadata, pricing, proof and review. - [22 September 2026 · 7 min read](https://www.oncebooks.com/blog/journal-and-planner-interior-specs) — Journal and planner interior specs: trim, gutter, bleed 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. - [17 September 2026 · 6 min read](https://www.oncebooks.com/blog/kdp-crossword-interior-specs) — KDP crossword interior specs: trim, margins and clues The trim sizes, margins, gutter and clue-list layout a KDP crossword interior needs to pass review, with the 14pt clue floor and an 8.5 by 11 trim. - [14 September 2026 · 5 min read](https://www.oncebooks.com/blog/word-search-with-a-print-ready-answer-key) — How to make a word search with a print-ready answer key How to make a word search with a clear answer key: the two solution styles, keeping the answer section compact, and how many answers per page. - [14 September 2026 · 6 min read](https://www.oncebooks.com/blog/kdp-word-search-interior-specs) — KDP word search interior specs: trim, margins and gutter The trim sizes, margins, gutter and bleed a KDP word search interior needs to pass review, with the large-print numbers that actually sell. [← All posts](https://www.oncebooks.com/blog)