Self-Publishing Basics: How to Pick the Size of your Book

by Joel Friedlander on September 13, 2010 · 129 comments

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Ed: Trim sizes in this post were updated on January 30, 2015.

As soon as you get serious about self-publishing a book, you are confronted with the choice of what size your book ought to be.

For instance, if you want to get a price on how much a book will cost to print, the first thing you need to know is the size.

Some pricing on digital books is in a range of sizes rather than having a different price for every different size, but that only helps a bit.

If you plan to print offset, you’ll need to specify the exact size in your request for an estimate. So one way or the other, it’s good to figure out near the beginning of your planning.

That’s not to say you can’t change your mind along the way. You won’t be locked into anything at this stage, so as long as you’re close to what the final size will be, the figures you’ll be working with should also be close enough until later in your production process.

Traditional Trim Sizes

Book sizes are known in printing terms as trim sizes since that’s where the book is trimmed at the last stage of production.

There are very few “rules” about book sizes, but there are a number of conventions that are good to know about. (All sizes quoted in this article are width x height.)

  • The only real rule is that mass market books have to be 4-1/4″ x 7″. These books are often sold through racks at point of purchase sites in supermarkets, airports, drugstores and the like and their size is an essential part of the way they are distributed. These are not usually self-published books, so you probably won’t have to worry about considering this size.
  • Trade paperbacks, a pretty loose category of books, are often in the 5-1/2″ x 8-1/2″ to 6″ x 9″ range. This page proportion—for instance in the 6″ x 9″ size—of 2:3 has long been considered an ideal for a book page, and you can create good looking books at different sizes but in the same page proportions. Most self-published books are trade paperbacks.
  • Manuals and workbooks are larger and, depending on the printing equipment being used to produce them, are in the 8″ x 10″ to 8-1/2″ x 11″ range. This size is also good for directories and instructional books with lots of graphics or detailed drawings to follow. It lends itself to a 2-column text layout which is an efficient use of space.
  • Novels appear in lots of different sizes but for a shorter book I prefer smaller sizes that seem to be more intimate a reading experience. 5-1/2″ x 8-1/2″ is probably the most popular size, but 5-1/4″ x 8″ is also a charming size for these books. Memoirs are similar sizes. Longer novels move to 6″ x 9″ to avoid becoming overly bulky at smaller sizes.
  • Short story collections or collections of essays are generally the same size as novels and memoirs
  • General nonfiction titles seem to come out in 6″ x 9″ making this size arguably the most popular of all. It’s also the most widely used size for hardcover books. When more room is needed on the page, for instance for sidebars or pull quotes, 7″ x 10″ is a frequent solution.
  • Photography or art books don’t conform to any particular size. They can be very small, or big and heavy “coffee-table” books. Many artists and photographers prefer books that are square or nearly square. This allows both horizontal and vertical pictures to have about the same amount of white space on the page.

Production Decisions and Trim Sizes

The decision you make on how to print your book will also affect your choice of trim sizes. Generally speaking, due to the highly automated nature of digital printing (used in print on demand distribution) you will have fewer choices of sizes.

For instance, here is the entire list of trim sizes offered by Lightning Source, the largest supplier of print on demand production:

4.37 x 7 inches (178 x 111mm)
4.72 x 7.48 inches (190 x 120mm)
5×7 inches (178 x 127mm)
5 x 8 inches (203 x 127mm)
5.06 x 7.81 inches (198 x 129mm)
5.25 x 8 inches (203 x 133mm)
5.5 x 8.5 inches (216 x 140mm)
5.83 x 8.27 inches (210 x 148mm)
6 x 9 inches (229 x 152mm)
6.14 x 9.21 inches (234 x 156mm)
6.625 x 10.25 inches (260 x 168mm)
6.69 x 9.61 inches (244 x 170mm)
7.44 x 9.69 inches (246 x 189mm)
7.50 x 9.25 inches (235 x 191mm)
7 x 10 inches (254 x 178mm)
8 x 8 inches (203 x 203mm)
8 x 10 inches (254 x 203mm)
8 x 10.88 inches (276 x 203mm)
8.25 x 11 inches (280 x 210mm)
8.268 x 11.693 inches (A4) (297 x 210mm)
8.5 x 8.5 inches (216 x 216mm)
8.5 x 9 inches (229 x 216mm)
8.5 x 11 inches (280 x 216mm)

CreateSpace, the Amazon print on demand supplier, has a similar list, but offers nothing over 8.25″:

5 x 8 inches, 12.7 x 20.32 centimeters
5.06 x 7.81 inches, 12.9 x 19.8 centimeters
5.25 x 8 inches, 13.335 x 20.32 centimeters
5.5 x 8.5 inches, 13.97 x 21.59 centimeters
6 x 9 inches, 15.24 x 22.86 centimeters
6.14 x 9.21 inches, 15.6 x 23.4 centimeters
6.69 x 9.61 inches, 17 x 24.4 centimeters
7 x 10 inches, 17.78 x 25.4 centimeters
7.44 x 9.69 inches, 18.9 x 24.6 centimeters
7.5 x 9.25 inches, 19.1 x 23.5 centimeters
8 x 10 inches, 20.32 x 25.4 centimeters
8.25 x 6 inches, 20.955 x 15.24 centimeters
8.25 x 8.25 inches, 20.955 x 20.955 centimeters
8.5 x 11 inches, 21.59 x 27.94 centimeters
8.5 x 8.5 inches, 21.59 x 21.59 centimeters

You’ll notice many of these sizes are identical to the Lightning Source sizes. Many are considered “industry standards.”

At more specialized digital printers, the choices may be even more limited. For instance, at the color book specialist, you have a choice of only 5 sizes for color books:

5 x 8 in., 13 x 20 cm
6 x 9 in., 15 x 23 cm
7 x 7 in., 18 x 18 cm
8 x 10 in., 20 x 25 cm
10 x 8 in., 25 x 20 cm
13 x 11 in., 33 x 28 cm
12 x 12 in., 30 x 30 cm

These are all larger sizes, intended for full-color books.

Other considerations may further limit your choices. I often recommend a creme-colored paper for novels and memoirs, and even some self-help and nonfiction books. I find it easier to read for long stretches and with less glare than the pure white papers.

However, both Lightning Source and CreateSpace limit which trim sizes are available with creme paper. For instance, at CreateSpace only the 5.25″ x 8″, 5.5″ x 8.5″, or 6″ x 9″ are available, all other sizes print with white paper only.

Offset Printing

Offset printing has few of the restrictions imposed by the digital book printers. Although it’s handy to stay with the traditional sizes, you can print your book any size you like. Some sizes may make more efficient use of paper and consequently be more economical, but it’s possible to do almost any size. I have a book on press right now that’s 9.5″ x 11.5″, an impossibility for digital printers at the moment.

Offset book printers will also make the full range of paper stocks from many paper mills available to just about any size book. Printing papers vary widely and you can choose different weights, colors, textures and finishes if you like. There really are very few limitations other than your creativity and your budget.

Picking a Size for Your Book

Most of the books I see from self-publishers are either 5-1/2″ x 8-1/2″ or 6″ x 9.” They are good, readable sizes that will work for many types of books. If this is your first book and it falls into the categories I’ve listed above, there’s a good chance one of these two sizes will work for you.

Pick a different size if:

  • your book is clearly in a different category, like a workbook
  • if you have a functional reason you need a larger or smaller book, like for a gift book or an atlas
  • if you want to stand out in your niche by having a different size than everyone else.

However, be wary of larger sizes, over 6″ x 9″ or 7″ x 10″. Why? Many book shelves—including the shelves in some bookstores—won’t easily handle books bigger than that. Unless you’re producing an art book, you probably don’t want to end up with a book that won’t fit anyone’s bookshelves.

Takeaway: Consider the genre of your book, the printing method you plan to use, and your paper choices before deciding on a trim size for your book. If possible, pick an “industry standard” size.

Image licensed under a Creative Commons Attribution 3.0 License, original work copyright by phing,

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    { 115 comments… read them below or add one }

    Gordon Burgin August 23, 2015 at 10:56 am

    I am in the middle stages of publishing my third pock-size Maths Puzzle Book.
    What is the ideal size if a pocket size book of this nature and what font is ideal for the text?
    My first 2 books were size 4.75 x 7 inches and my text font was ARIAL. The end results were acceptable but I would appreciate your recommendations for my new book. Thank you


    Joel Friedlander August 25, 2015 at 10:48 am

    Gordon, I wouldn’t use Arial in a book, I don’t think it’s a good choice for long documents like books. Check out this post (and the many comments) for more info: 5 Favorite Fonts for Interior Book Design.


    Andrew Jonathan Fine August 8, 2015 at 2:26 pm

    I use Times Roman 10 for the interior of my 9 X 6 trade paperback to good effect, and I space between lines with Times Roman 4. Ingram now has 4-1/4″ x 7″ available, what font size should I use with that to keep the book readable?


    Andrew Jonathan Fine August 8, 2015 at 2:27 pm

    excuse, space between paragraphs.


    Joel Friedlander August 10, 2015 at 10:55 am

    I wouldn’t go smaller than 10 point if you’re using Times Roman for your book, Andrew.


    Lauren June 18, 2015 at 10:43 pm

    Very helpful. Thanks!


    Anya March 27, 2015 at 11:48 am

    Hi Joel,

    Thank you for a very informative article.

    I was wondering if you could add a comment on children’s books and picture books. What is their traditional or ideal length and trim size?

    Thank you,



    Austin aka Written Sound March 24, 2015 at 2:34 pm

    Ok, I am looking for a book size that would work for the first part of a series that is in the works, the first book on pdf has 598 pages front and back, this is a fiction book.


    Trim size and long books March 6, 2015 at 5:31 pm

    Hi Joel,
    How does the length of a novel affect trim size selection? My current project is about 120,000 words and will come out to between 325 and 360 pages, depending on the font we choose. We’ve been thinking 6×9 as a standard and to get the creme page color. For a longer novel like this, should we consider a larger trim size? Thanks.


    Bren February 5, 2015 at 1:17 pm

    Hi, many thanks for your great article. I’ve been commissioned to produce a photo type book, and am at a loss as to what size to opt for. It’s about Homeless Persons and will be photos and text. Any ideas? Again, Thanks for a great article.


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