The file must contain spreads (two pages side by side), not single pages.
Minimum trim size: 105 × 145 mm.
Maximum trim size: 297 × 297 mm.
Maximum number of spreads: 25 (does not need to be even).
Safe margins: Keep text and important elements at least 5 mm from trim edges.
We also recommend an inner margin of at least 5 mm to prevent text from falling into the fold area.
Use our generator, which not only calculates dimensions but also allows you to place your design directly onto a PDF template. This helps you verify that everything fits perfectly. Book interior template generator
