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Trim Sizes & Page Margins

Configure your book’s physical dimensions and page margins for print-on-demand publishing. Pair these with book page layout and fonts for body typography and book headers and footers for running heads.

Trim Sizes

Standard trim sizes for print-on-demand:

Small
4.25” × 6.87”4.25” × 7”4.37” × 7”4.5” × 7”5” × 8”5.06” × 7.81”5.25” × 8”
Medium
5.5” × 8.5”6” × 9”6.14” × 9.21”6.69” × 9.61”
Large
7” × 10”7.44” × 9.69”7.5” × 9.25”8” × 8”8” × 10”8.5” × 11”

Page Margins

The margins panel has separate Page, Header, and Footer tabs, each with an always-on Preview that highlights whatever field you are editing, so you can see exactly how your margins fit together.

Inner (binding side)

The inner margin where pages bind together. Lacuna defaults to 0.875 inches, a safe default for most page counts.

To get as tight as possible, check KDP’s Paperback Manuscript Guidelines for the minimum gutter based on your page count and trim size.

Outer (left & right)

The outer edge margin, calculated automatically from your trim size to keep the page balanced.

You have two settings for controlling vertical spacing:

  • Total Space: The full distance from the top (or bottom) of the page to the first (or last) line of body text. This controls how much room your header or footer area takes up.

  • Safe Zone: The margin from the very edge of the page. Increase this if you’re seeing bleed or cutoff issues with your headers or footers.

With trim and margins set, export a print-ready PDF for KDP and IngramSpark.