Artwork: Book Sizes Explained

What does “book size” mean in printing?

In printing, book size refers to the final trimmed dimensions of the finished book once it has been printed, folded, bound, and cut. This is the size the reader experiences when holding the book.

Book sizes are usually described by their height and width in millimetres. These measurements refer to the finished page, not the larger sheet the book is printed on during production.

Why book size matters

Book size influences almost every part of the production process. It affects how efficiently pages can be printed on a sheet, how the book is bound, how much paper is used, and how the book behaves when opened and read.

From a reader’s perspective, size impacts comfort, portability, and usability. From a production perspective, it directly influences cost, waste, and turnaround time.

Because of this, book size is both a design decision and a technical one.

Common book sizes and when they’re typically used

While books can be produced in almost any size, certain formats are widely used because they balance readability, production efficiency, and cost. These sizes have become familiar to readers and work well within standard printing workflows.

An A5 format (210 × 148 mm) is one of the most common choices for novels, journals, and short-run books. It is compact, comfortable to hold, and efficient to produce, making it a popular option for both authors and organisations producing manuals or internal publications.

A Novel or Digest size (approximately 198 × 129 mm) is often chosen for fiction titles. This slightly narrower format feels traditional in the hand and works well for longer-form reading. Because of its proportions, it is particularly well suited to perfect binding and paperback books.

Royal size (234 × 156 mm) is commonly used for non-fiction, academic titles, and professional publications. The larger page area allows for more spacious layouts, diagrams, and footnotes while still remaining manageable in size.

For larger-format content, A4 (297 × 210 mm) is frequently used for workbooks, training manuals, reports, and reference material. This size provides ample space for structured layouts, tables, and instructional content, though it is less portable than smaller formats.

Square formats and bespoke sizes are sometimes chosen for visual or creative projects such as photography books, portfolios, or premium journals. While visually distinctive, these formats usually require more careful planning and may carry additional production considerations.

How examples help guide your decision

These example sizes are not rules, but reference points. They exist because they work well both for readers and for production. Starting with a recognised format often simplifies artwork setup, keeps costs predictable, and reduces the risk of unexpected issues during printing and binding.

Non-standard sizes are always possible, but they are best chosen with a clear reason rather than by accident.

Using example sizes during artwork setup

When preparing your artwork, selecting one of these standard sizes at the document setup stage ensures that page dimensions, margins, and bleed are aligned correctly from the outset. This helps prevent resizing or reworking files later in the process.

If you are unsure which size to choose, starting with a common format and adjusting only if needed is often the most efficient approach.

If you’re still unsure

If none of the example sizes feel like the right fit, that’s fine. Explaining how the book will be used is often more helpful than naming a size upfront.

We can advise on whether a standard format will work well, or whether a bespoke size is worth considering based on your content and goals.

Portrait vs landscape formats

Most books are produced in portrait orientation, where the height of the page is greater than the width. This format suits long-form reading and is familiar to most readers.

Landscape formats are wider than they are tall and are typically used for visual content such as photography, presentations, or instructional material. While visually striking, landscape books can require additional consideration in binding and handling.

The choice of orientation should reflect how the content will be read and used.

Trim size and artwork setup

When preparing artwork, the page size in your document must match the final trim size exactly. This ensures that pages are printed and cut correctly during production.

Artwork should be designed with trim, bleed, and margins in mind. Content that sits too close to the edge risks being cut during trimming, while full-bleed designs must extend beyond the trim size to allow for accurate finishing.

Correct sizing at the artwork stage helps avoid delays and corrections later.

Book size and binding considerations

Different binding methods interact with book size in different ways.

For example, thicker books may require wider spines, which influences how much space is available for spine text. Smaller formats may limit spine width altogether at lower page counts.

Some binding methods, such as wiro or spiral binding, also require additional clearance near the binding edge, which can influence usable page area.

Choosing a size that works well with the intended binding method helps ensure the finished book functions as expected.

Cost implications of book size

Book size has a direct impact on cost. Larger pages use more paper, and non-standard sizes may increase waste or require additional setup.

In short-run printing, selecting a size that aligns with standard production layouts can help keep costs under control without compromising quality.

This doesn’t mean non-standard sizes should be avoided, but they should be chosen deliberately with an understanding of the trade-offs involved.

Reader experience and usability

Beyond production, book size plays a significant role in how a book is experienced.

Smaller formats are often more portable and comfortable to hold, while larger formats allow for more spacious layouts and larger images or text. The intended audience and use case should guide the decision.

A novel designed for extended reading may benefit from a different size than a workbook, journal, or reference guide.

Choosing the right size for your project

There is no universally “correct” book size. The right choice depends on:

• The type of content

• How the book will be used

• Page count and thickness

• Binding method

• Budget and production constraints

Understanding how these factors interact helps ensure the finished book feels intentional rather than compromised.

If you’re unsure

If you’re unsure which book size is best for your project, you don’t need to decide alone.

Providing a brief description of your content and intended use allows us to advise on a suitable size that balances design intent with production practicality.

Related guides

You may also find these articles helpful:

• Supplying Print-Ready PDF Files

• Trim and Margins Explained

• Book Spine Width Explained

• Binding Types Explained