Picture Book Sizes: The Complete Guide to Standard Children’s Book Dimensions

As a picture book author, selecting your book size is both a technical and creative choice that can significantly influence children’s reading experience. The size of your book affects everything from how illustrations are displayed to how text flows on the page, shaping how kids interact with your story.

Understanding trim sizes, bleed, and orientation is essential to producing a professional, visually appealing book. The right dimensions enhance your book’s aesthetic so ensure that it aligns with industry standards, making it easier to print, distribute, and market.

In this article, we’ll guide you through the key considerations for choosing your book size, including the role of book size, the importance of book bleed, and the advantages of standard dimensions. You’ll also discover examples of popular orientations and sizes, and tips to balance creativity with practicality.

Here are important points to consider regarding choosing your picture book size:

• What is trim size and why is it important for picture books?
• The impact of book bleed on children’s book size
• Why standard book sizes matter for children’s book printing
• Factors to consider when selecting children’s books sizes
  • Age group and target audience
  • Genre and category
  • Personal preference
  • Book pages
• Common book sizes for picture books with examples
  • Portrait orientation
    • 8 x 10 inches
    • 8.5 x 11 inches
  • Square orientation
    • 8.5 x 8.5 inches
  • Landscape orientation
    • 10 x 8 inches
    • 11 x 8.5
• Final thoughts on choosing the best size for your picture book

So, let’s cover each of those points!

What is Trim Size and Why is it Important for Picture Books?

Trim size, also known as book size, refers to the actual book dimensions of the interior pages of your book, measured in length by height. Tamara Dever, founder and creative director of TLC Book Design, explains that if you have a paperback book, the dimensions of the interior are the trim size of your book. If you plan to produce hardcover picture books, keep in mind that the actual cover size is slightly larger than the pages inside. The book’s trim size is still the size of the pages inside your book.

“Trim” refers to the fact that the book is printed slightly larger than the final size, and then pages are trimmed down to the final size.

Any self-published author or publisher carefully considering the overall aesthetic and readability of the book should choose the right trim size, which can enhance the visual appeal of illustrations and ensure that text and images align harmoniously on each page.

The Impact of Book Bleed on Children’s Book Size

Any image that’s meant to touch the edge of a page has a bleed. Book bleed refers to the extra art that extends beyond the trim size of your book, ensuring that no unprinted edges appear after the book is trimmed. This is done because printing and trimming are not 100% exact, so bleed leaves a slight margin for error and still ensures that the illustrations cover the entire page, with no white margin.

In other words, books are actually printed on paper that’s larger than the final trim size of the book. The bleed adds an extra 1/8 inch (3 mm) to each outer side of the double page spread: the top, the bottom, the outsides. That area is going to get cut off once the book has been printed, folded, and bound.

A book spread showing bleed, trim and the safe area of a book

Without adequate bleed, the risk of paper wasted increases, as misalignment during the printing process can lead to additional print runs and printing costs. There may be potentially unusable copies where unwanted white parts could show up on the pages since it’s difficult for printers to trim exactly on the line where the illustration and the white part separate.

When you create ebooks, the bleed and trim is not important. But the illustrator and designer should create for print first, and then creating the ebook with the same files is very simple after that.

Dever has a valuable tip for children’s book authors: “Your illustrator needs to know the book’s trim size plus the bleed size before doing their final illustration to make sure that they include bleed in there. They also need to make sure nothing gets too close to the trim edges or gets caught in the gutter. The illustration for a hardcover case has to extend almost an inch on all sides because the book cover art has to wrap over the edge of the hardcover book cover. So be sure to get a template for the case of that hardcover book for your illustrator before they start creating the cover art.”

Why Standard Book Sizes Matter for Children’s Book Printing

We all know that children’s book printing process costs money. Having a standard size allows for the most cost-efficient printing because it simplifies the book layout and design process where creators can easily find templates and guidelines that match industry standards as opposed to custom dimensions that often require unique setups and additional adjustments during printing.

Choosing standard children’s book sizes ensures compatibility with popular offset print services and print-on-demand platforms like Amazon KDP and IngramSpark. These platforms offer a variety of standard sizes that suit different types of children’s books, allowing authors to concentrate on the creative aspects of their work without worrying about the book’s physical dimensions posing any hurdles in the publishing process.

Furthermore, opting for a standard book size can make it easier to distribute and market your book. Books that follow standard dimensions fit neatly on bookstore and library shelves, making them more likely to be accepted by retailers and libraries. This increases the chances of your children’s book reaching its intended audience, whether they are beginning readers, newly independent readers, or middle-grade readers.

A well-chosen size can enhance the visual appeal of illustrations and ensure that text and images align harmoniously on each page.

Factors to Consider When Selecting Children’s Books Sizes

For a self-published author, several factors come into play when determining the perfect size for your children’s book, each influencing the overall appeal and practicality of the book.

Age Group and Target Audience

Different age groups require different book sizes. For instance, children’s books for a very young age group, generally ages 3 to 5, often feature larger dimensions to accommodate eye-catching illustrations and simple text, making it easy for them to engage with the content as the book is read to them. We’ll cover more about book sizes in the section, Common Trim Sizes for Picture Books with Examples.

As children grow into beginning readers, early reader book sizes become more compact, catering to children ages 5 to 9 who are transitioning from picture books to more text-heavy stories. The industry standard size for early reader books in inches is 6 x 9. They can also be 5.5 x 8.5.

The sizes of chapter books include 5.25 x 7.5 and 5.25 x 7.75, or 5.5 x 8.5. Created for newly independent readers ages 7-10, chapter books primarily consist of prose with a few illustrations.

Middle grade book sizes are typically designed for readers between the ages of 8 to 12 and these middle grade stories have more mature and complex narratives. These middle grade novels often have sizes that are either 5.25 x 5.5 or 5.25 x 7.75 to suit their increased page count and smaller, intricate illustrations.

Know which age group your children’s book is for (target audience) in the first section of this article.

Genre and Category

Picture books, with their emphasis on visual storytelling, often benefit from larger formats that showcase colorful illustrations prominently. Early readers, on the other hand, strike a balance between images and text, requiring a size that supports both elements harmoniously. Chapter books, aimed at slightly older children, can afford to be more compact, reflecting their focus on narrative development.

If you will self-publish, check the sizes major publishers use and recent customer buying trends in your book’s category to choose the best size. For example, if the book you will self-publish tackles geography or travel, such as Sisters on Adventure: New Zealand by Shawn Kekovich, it would help to check what sizes are trending for similar, traditionally published books and whether these kinds of books are well-received in the marketplace within the past year.

Personal Preference

Consider what you wish to convey through your children’s book and how the size can enhance the storytelling experience. Identify your book’s purpose and your author vision. Are you aiming for a cozy bedtime story or an engaging educational tool? Make sure your book’s dimensions align with your creative goals.

Expenses are also part of printing paperback books and hardcover books, so it’s essential to weigh the overall printing costs against your personal budget and distribution plans.

Book Pages

The page count of your book correlates with choosing your size. The more pages you have in your children’s book, the more you have to increase the gutter or inside margin of the book to allow space for the spine. Remember that children’s books with more pages are more prone to gutter loss, where the bound pages curve in to meet the spine. Another thing to remember is that font size and spacing are usually proportional to the book’s size. A larger size is usually needed when your story is told in a larger font. 

Read the section How Many Pages Should a Children’s Book Be? in this article.

Here are additional tips to work out the most efficient trim size:

• If you want to save on printing, increase the size so you can reduce the amount of page, which uses more paper.
• Don’t go overboard in increasing your size. Bookshops may find paperback books and hardcover books with larger pages more awkward to stock. 
• When determining the book size and page count, ensure that illustrations and text are displayed optimally without overcrowding or excessive white space.

Common Book Sizes for Picture Books with Examples

Here are some standard book sizes for picture books, each offering unique benefits for different types of stories and illustrations in the children’s book publishing industry:

Portrait Orientation

Portrait children’s book sizes are often chosen for books due to their traditional and recognisable layout. This format offers ample space for text and illustrations to coexist without overcrowding, ensuring that young readers can easily follow along with the story.

8 x 10 inches

The 8 x 10 inches format offers a versatile canvas for both illustrations and text. This size strikes a balance between being large enough to showcase colorful illustrations and compact enough for easy handling by young children.

Famous example:
Last Stop on Market Street by Matt de la Peña

An example by GetYourBookIllustrations of a picture book with this size is Hunting Orange: A Mixing Colour Adventure by Moza A. Himid. This size and orientation works best to accommodate the visual support images found at the bottom of every page and avoid overcrowding of images and text. It also fits the scenes in the story that often encompass the ground up to the sky.

An example of a picture book that is 8 x 10. Hunting Orange: A Mixing Colour Adventure by Moza A. Himid. Illustrated and designed by GetYourBookIllustrations.

Interior spread of Hunting Orange: A Mixing Colour Adventure by Moza A. Himid. Illustrated and designed by GetYourBookIllustrations.

8.5 x 11 inches

The larger dimensions make it easy to capture the attention of beginning readers with vibrant, eye-catching visuals and adequately sized text font. An example of a children’s book with the trim size of 8.5 x 11 inches is Little Red Driving Hood and the Three Repairs by Stacey Rayz. The larger dimensions of this vertical format allow for a good amount of space for the text and text spacing without sacrificing space for illustrations.

Famous example:
If You Give a Mouse a Cookie by Laura Numeroff

The Right Word: Roget and His Thesaurus by Jen Bryant and Melissa Sweet is a great example of a nonfiction book in this size.

Book cover of Little Red Driving Hood and the Three Repairs by Stacey Rayz, a picture book with the size of 8.5 x 11 inches

Interior spread of Little Red Driving Hood and the Three Repairs by Stacey Rayz

Square Orientation/Same Dimensions

Square children’s book sizes provide a balanced and symmetrical layout, making them ideal for stories that require equal emphasis on both text and illustrations. The popularity of the square format also stems from its compatibility with the services offered by most offset printers and print-on-demand platforms.

8.5 x 8.5 inches

The 8.5 x 8.5 inches size is the most popular square format for children’s picture books due to its balanced and versatile design. Additionally, this format is easy for children to handle, making it ideal for kids who are just beginning to explore children’s books.

Two of the most famous examples are:
Chicka Chicka Boom Boom by Bill Martin Jr. and John Archambault
Brown Bear, Brown Bear, What Do You See? by Bill Martin Jr. and Eric Carle

An example of a book with this size is Bella’s Choice by Elizabeth Higgins:

Front cover of Bella’s Choice by Elizabeth Higgins, with the size of 8.5 x 8.5 inches. Illustrated by GetYourBookIllustrations.

Interior spread of Bella’s Choice by Elizabeth Higgins. Illustrated by GetYourBookIlllustrations.

Landscape Orientation

One of the primary advantages of having a landscape orientation in children’s book sizes is its ability to present expansive, panoramic illustrations that create an immersive reading experience. This format is especially effective for stories that involve movement or action, as the wide layout provides a dynamic canvas for illustrators to depict scenes that flow seamlessly from one page to the next.

Additionally, landscape children’s book sizes offer flexibility in text placement and design, allowing for creative integration of text and images that enhance the storytelling experience. Authors also choose landscape orientation for its unique visual appeal, which sets their children’s books apart on library and bookstore shelves. The horizontal format can make a book stand out, attracting the attention of children and their parents.

10 x 8 inches

The 10 x 8 size is particularly suitable for stories with illustrations that do not require extensive space. Its slightly smaller dimensions make it a cost-efficient trim size, as it uses less paper and can result in lower printing costs.

Famous examples:
Make Way for Ducklings by Robert McCloskey
Tuesday by David Wiesner

Another example of a book with this size is Shortcut by Donald Crews:

Front cover of Shortcut by Donald Crews with the size of 10 x 8 inches

Interior spread of Shortcut by Donald Crews

11 x 8.5

The 11 x 8.5 size offers a larger canvas for children’s books, providing ample space for expansive illustrations and more detailed artwork. This size is perfect for picture books with more far more complex scenes and narratives that benefit from a broader visual scope. An example of a book with this size is Sisters on Adventure: New Zealand by Shawn Kekovich. The slightly larger dimensions of this horizontal layout are perfect for illustrating the panoramic views of mountain ranges, islands, and oceans. The well-chosen size also signifies movement, action, and dynamism in the travel-themed book, with the sisters often seen riding airplanes and boats to reach various destinations.

Famous examples:
Goodnight Moon by Margaret Wise Brown and Clement Hurd
The Polar Express by Chris Van Allsburg

Front cover of Sisters on Adventure: New Zealand by Shawn Kekovich, a picture book with the trim size of 11 x 8.5 inches. Illustrated and designed by GetYourBookIlllustrations.

Interior spread of Sisters on Adventure: New Zealand by Shawn Kekovich

Final Thoughts on Choosing the Best Size for Your Picture Book

Whether you choose offset printing or print on demand or both, the trim size of your children’s book affects its look, readability, and impact. By considering your target age group, genre, and budget, you can choose the best size for your story and illustrations. Standard children’s book sizes offer a cost-effective option for self-publishing process.

Don’t forget the importance of technical details like bleed, gutter space, and page count. These elements, when carefully planned, can prevent costly mistakes and elevate the quality of your children’s book. Working with your illustrator to align artwork with the chosen dimensions ensures that every detail looks polished and professional.

Ultimately, the best size for your children’s book is one that lets you achieve your creative vision while meeting the needs of your young readers.

If you have a story for children in the making, let’s discuss your options for your illustrations and book size! Let’s chat!

Make our day and leave a comment!

1. What’s your personal favourite size on the list we gave? Why?
2. Which size or orientation would you choose for your children’s picture book idea, and why?