For authors, designers & indie publishers

Everything you need to turn a manuscript into a real book.

Trim sizes, paper sizes, spine widths, cover templates, ISBN tools, fonts and a directory of publishers, awards and literary magazines — 9,900+ reference pages built from open data and careful book math.

6 x 9 cover size 80,000 words A4 ISBN barcode Copyright page EB Garamond

Today · November 2

What's new →

On this day

Dale Brownborn 1956
Thomas Mallonborn 1951
Lois McMaster Bujoldborn 1949
Josse Goffinborn 1938

Trending on Open Library

Atomic Habits James Clear
Rich Dad, Poor Dad Robert T. Kiyosaki
The 48 Laws of Power Robert Greene
Harry Potter and the Philosopher's Stone J. K. Rowling
The Art of Peace Morihei Ueshiba

Full list →

New public-domain books

All new arrivals →

Poem of the day

In My Solitary Hours in My Dear Husband his Absence

O Lord, Thou hear'st my daily moan
And see'st my dropping tears.
My troubles all are Thee before,
My longings and my fears.
…

Read the poem by Anne Bradstreet →

Term of the day · Printing & prepress

Crop marks

Thin lines printed outside the page area that show the printer where to trim. Most print-on-demand services want PDFs without crop marks.

Latest update: 40 poems; 34 new public-domain books; 20 cover art; 10 popular books; 7 audiobooks.

Free calculators

All tools →

Spine & cover Calculate paperback spine width and full-wrap cover dimensions for any trim size, page count and… Words → pages Estimate how many printed pages your manuscript will be at any trim size and font size, plus spine… ISBN converter Convert ISBN-10 to ISBN-13 and back, validate check digits and hyphenate any ISBN correctly using… ISBN barcode Create a print-ready Bookland EAN-13 barcode for your ISBN with an optional 5-digit price add-on… Paper size converter Convert paper and page sizes between millimetres, centimetres, inches, points and pixels at any… GSM ↔ lb Convert paper weight between g/m² and US basis weights — bond, text (book), cover, index and… Image DPI Check whether an image is sharp enough to print: maximum print size at 300 dpi, pixels needed for… Booklet imposition Get the page order for printing a saddle-stitched booklet or zine on a home or office printer…

Explore the reference

35 pages Trim sizes Every paperback and hardcover size with margins, page counts and platform availability. 871 pages Spine width & covers Cover dimensions for 12 trims and 66 page counts, with templates. 357 pages Word count to pages How long your manuscript will be in print, at any trim and font size. 285 pages Paper sizes ISO, US, JIS, envelopes, photo, poster and historic sizes in every unit. 1,715 pages Free fonts for books Open-source fonts with book-page specimens and pairing ideas. 1,342 pages Publishers Publishing houses, university presses and imprints worldwide. 781 pages Literary awards Book prizes with organisers, prize money and recent winners. 294 pages Literary magazines Journals and reviews for short fiction, poetry and essays. 825 pages Public-domain classics Word counts and print-length estimates for the most-read free books. 298 pages ISBN groups Every ISBN registration group and its publisher ranges. 49 pages Book anatomy & binding Front matter order, binding methods and how they compare. 20 pages Imposition & signatures Folding schemes and booklet page orders with diagrams. 72 pages Paper weight & stocks GSM and pound conversions, thickness and paper types. 59 pages Genres & book length Expected word counts and trims for every major category. 172 pages Glossary Printing, binding, typography and publishing terms explained. 426 pages Classic typefaces Garamond, Baskerville, Caslon and the history of type. 367 pages On this day Writers born and died, and literary events, for every date. Updated daily Trending today The books readers are looking for right now on Open Library. 588 pages Public-domain poems Full texts of classic poems with forms and typesetting notes. 285 pages Free audiobooks LibriVox recordings with running times and print lengths. 124 pages Nobel laureates Every Nobel Prize in Literature with the official motivation. 571 pages New books This year's novels and nonfiction with Wikipedia articles. 92 pages Popular books Page counts and reading times of books readers track now. 220 pages Free cover art Public-domain paintings (CC0) for book covers.

Popular trim sizes

All trim sizes →

6 x 9 in US Trade 6 x 9 inNonfiction, Fiction, Memoir 5.5 x 8.5 in Digest 5.5 x 8.5 inFiction, Nonfiction, Memoir 5 x 8 in 5 x 8 inNovels, Novellas, Poetry 8.5 x 11 in Letter 8.5 x 11 inWorkbooks, Manuals, Coloring books Royal (6.14 x 9.21 in) 6.14 x 9.21 inNonfiction, Hardcovers, Academic 8.5 x 8.5 in Square 8.5 x 8.5 inPicture books, Coloring books, Photography

Guides

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Directory highlights

About this site

Leaf & Spine is an independent, free reference for people who make books. The numbers come from published printer specifications and transparent formulas — see how we calculate — and the directories are compiled from open data sources credited on every page.