---
title: "How to Choose a Trim Size for Your Novel"
description: "What trim size means, the standard sizes for fiction (5x8, 5.25x8, 5.5x8.5, 6x9), and how to pick the one that fits your genre and page count."
source: https://usegalley.com/blog/choosing-a-trim-size
---
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# How to Choose a Trim Size for Your Novel

July 29, 2026 [Formatting](https://usegalley.com/blog/tag/formatting)

![Three paperback books shown at different trim sizes](https://usegalley.com/images/blog/choosing-a-trim-size.png) TL;DR Trim size is the finished width by height of your printed book. For most fiction the safe choices are 5x8, 5.25x8, or 5.5x8.5. 6x9 is standard for literary and non-fiction but reads as 'big' for a paperback novel. Pick your trim before you format, because it changes your page count, your margins, and how the book feels in a hand.

[Trim size](https://usegalley.com/glossary#trim-size) is just the dimensions of the finished, trimmed page. It’s the first
formatting decision you make, and it quietly drives most of the others, so it’s
worth two minutes of thought before you touch anything else.

## The standard fiction trims

- **5” x 8”** - compact, common for genre paperbacks

- **5.25” x 8”** - a touch roomier, very common

- **5.5” x 8.5”** - the workhorse for self-published fiction

- **6” x 9”** - standard for literary fiction, memoir, and non-fiction

If you’re unsure, 5.5 x 8.5 is the safe default. It looks like a normal novel on
a shelf and it prints cheaply. (Amazon lists every size it supports, with the
page-count limits for each, in its [print options](https://kdp.amazon.com/en_US/help/topic/G201834180).)

## How trim interacts with page count

Here’s the part people miss: a smaller trim doesn’t make a smaller book, it
makes a thicker one. The same words in a 5 x 8 spread across more pages than in
a 6 x 9, which raises your print cost and widens your spine.

That matters for two reasons. Print-on-demand prices per page, so trim is a real
cost lever. And your [spine width](https://usegalley.com/glossary#spine-width), which you need for the cover, depends entirely
on the final page count, which depends on the trim. Change your trim late and
your cover file, and all your [KDP margins](https://usegalley.com/blog/format-a-paperback-for-kdp),
are suddenly wrong.

## Matching trim to genre expectation

Readers have quiet expectations. A 6 x 9 beach-read thriller feels oversized and
a little textbook-ish, because 6 x 9 reads as “serious non-fiction” to a lot of
people. A dense literary novel in a tiny 5 x 8 can feel cramped.

The cheat is to pull three or four comparable titles off your own shelf, measure
them, and match. Your readers already learned what your genre “should” feel like
from those books, so you may as well meet the expectation.

## Pick it first, once

Choose trim before you format, not after. In Galley you
[write on the exact trim you pick](https://usegalley.com/features/make-the-book), so the page you
draft on is the page that prints. There’s no guessing how the text reflows
later, because it doesn’t reflow. [What you see is the book](https://usegalley.com/blog/write-on-the-real-page).

If you want to see the sizes against each other before you commit, the
[trim size comparison](https://usegalley.com/resources/book-trim-size-comparison) draws each one at
true scale, and [words to printed pages](https://usegalley.com/resources/word-count-to-page-count)
tells you what your own [word count](https://usegalley.com/glossary#word-count) runs to in each.

## More on formatting

- [Front Matter and Back Matter: The Right Order for a Novel](https://usegalley.com/blog/book-front-matter-order)Every page that comes before and after your story (half-title, title, copyright, dedication, acknowledgements) in the order printers and readers expect them.

[Every formatting post](https://usegalley.com/blog/tag/formatting)

[← All posts](https://usegalley.com/blog)

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