How to Publish a Children's Book (2026)
The short answer
A picture book is 32 pages as standard (page counts run in multiples of 8 for offset printing: 24, 32, 40 or 48), printed in full colour throughout, in a square or portrait trim. 8.5 x 8.5 in (216 x 216 mm) is the most common size. Write to your age band, leave room for the illustrations, then edit, illustrate, design and print.
Want it done for you? See how to self-publish a children's book with Harmony Publishing
Last reviewed: · By Harmony Publishing
What Makes a Picture Book Different
A picture book tells its story through words and art together, so the page count, the trim size and the colour printing are all fixed before you finish the manuscript. A 32-page book leaves roughly 12 to 14 double-page story spreads once the front and back matter are counted, so the story has to be built to fit that space.
Illustration is part of the planning from the start, not an extra added at the end.
Standard Trim Sizes and the 32-Page Rule
Printers fold sheets into 8-page signatures, so page counts run in multiples of 8. Thirty-two pages (two signatures) is the most economical length and the length bookstores and libraries expect.
| Trim (inches) | Millimetres | Shape |
|---|---|---|
| 8.5 x 8.5 in | 216 x 216 mm | Square, the most common and classic |
| 8 x 10 in | 203 x 254 mm | Portrait |
| 10 x 8 in | 254 x 203 mm | Landscape |
Also seen in the market: 7 x 10, 8 x 8, 10 x 10 and 8.5 x 11 in. Keep one trim across all markets so you need only one ISBN and one set of files.
Age Bands
The age band decides the length, the vocabulary and the format.
- Board books, ages 0 to 3: smaller trims (typically 6 x 6 or 7 x 7 in), 12 to 24 pages, thick cardboard.
- Picture books, ages 3 to 7 (some sources say 3 to 8): the 32-page book described here.
- Early readers, ages 5 to 7: written for the child to read alone.
- Chapter books, ages 7 to 10, and middle grade, ages 8 to 12, are mostly text with fewer illustrations.
Hardcover vs Paperback
Both formats are available to self-publishers. Amazon KDP offers hardcover as a case laminate with no dust jacket (75 to 550 pages), and IngramSpark offers hardcover too. KDP paperback supports 24 to 828 pages depending on trim and ink. A hardcover needs its own ISBN, separate from the paperback.
Full-Colour Printing
Full-colour interiors on every spread are the standard for picture books, and they are also the main driver of the printing price. Files need bleed: as a KDP example, a full-bleed 8 x 10 in interior PDF must be 8.25 x 10.25 in, which is the trim plus 0.125 in on each side.
Editing and Designing
Edit the text before it goes to the illustrator. Then the illustrated spreads are laid out to the trim, with bleed. The manuscript stage is covered in our children's book writing guide, linked below.
The Steps to Publish a Children's Book
The order matters, because each step fixes something the next one depends on.
- Write the story for one age band and keep it short enough to leave room for art.
- Edit the text before it goes to the illustrator, so the pictures are not redrawn around later changes.
- Plan the trim size and page count (32 pages is the standard) before any illustration is drawn.
- Commission or create the illustrations, approving a character sketch first and then every spread.
- Lay the book out to the trim, with bleed, in full colour.
- Design the cover to fit the final page count and assign the ISBN and barcode.
- Choose paperback, hardcover or both, and where to print: print-on-demand for small numbers or a print run for a launch.
- Publish to the stores and plan how you will tell readers about the book.
What It Costs to Publish a Children's Book With Harmony
Harmony Publishing packages a children's book end to end. The prices are $1,499 for Picture Book, $3,799 for Illustrated, $5,499 for Complete, and each one includes a custom cover design, the ISBN and barcode, a 32-page full-colour layout, a paperback and an eBook, and distribution to Amazon, Barnes & Noble and, through IngramSpark, bookstores and libraries.
The difference between the packages is how much of the book you bring: finished artwork, a finished text that needs illustrations, or only an idea or early draft.
| Package | Price (USD) | Illustrations | Printed copies |
|---|---|---|---|
| Picture Book | $1,499 | Author supplies | 50 paperback |
| Illustrated | $3,799 | 24 original, character sketch approval, 2 revision rounds | 100 paperback |
| Complete | $5,499 | 32 original, character sketch approval, 3 revision rounds | 200 paperback + 10 hardcover |
These are Harmony Publishing's published prices. The industry figures elsewhere on this page come from the sources listed at the end.
Children's Book Cover Design, ISBN and Distribution
A picture book cover has to work as a small thumbnail on a store page and as a full wrap on the shelf, so it is designed to the final page count and trim. Every Harmony children's package includes a custom cover design, with the ISBN and barcode assigned for you (one per format in the Complete package).
Printed copies come with every package, and the book is listed on Amazon, Barnes & Noble and, through IngramSpark, in bookstores and libraries. You keep 100% of your rights and royalties.
Publishing Your Picture Book
Once the files are ready, you choose where to print and sell: print-on-demand for small numbers, or a print run for a launch. Our children's book printing guide, linked below, covers both. If you would rather have the whole process managed, Harmony Publishing offers full-service self-publishing for children's books; see the hub page and the packages page for what is offered and the price.
Publishing a children's book with Harmony
Harmony Publishing is a full-service self-publishing company. See how we work on children's books, then check the packages for what is included and the price.
Frequently asked questions
What size should my picture book be?
The most common size is 8.5 x 8.5 in (216 x 216 mm), a square trim. Other standard choices are 8 x 10 in portrait (203 x 254 mm) and 10 x 8 in landscape (254 x 203 mm).
How many pages should a picture book be, and why 32?
Thirty-two pages is the industry standard. Printers fold sheets into 8-page signatures, so page counts run in multiples of 8 (24, 32, 40, 48), and 32 pages is the most economical length and the one bookstores and libraries expect.
How many of the 32 pages are the actual story?
After the front and back matter, a 32-page picture book leaves roughly 12 to 14 double-page story spreads.
Hardcover or paperback for a picture book?
Both are offered by KDP and IngramSpark. A hardcover needs its own ISBN, separate from the paperback.
What is a board book?
A board book is for ages 0 to 3: a smaller trim (typically 6 x 6 or 7 x 7 in), 12 to 24 pages, printed on thick cardboard.