Authors searching for an IngramSpark PDF trim size guide usually failed validation once — crop marks, bleed, or trim mismatch. KDP and IngramSpark overlap but are not identical.
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Shared goals, different inspectors
Both want print-ready PDF interiors. IngramSpark is often stricter about technical specs. Designing to the stricter rules first saves dual uploads.
Trim size strategy
- Pick a trim both retailers support for your binding
- Do not resize covers after interior trim changes
- Document exact page size in your project settings
Bleed & crop marks
Full-bleed elements must extend beyond trim. Crop marks help printers; some pipelines want them, some want clean trim boxes — read the current retailer spec before final export.
Pass inspection on the first try
- Lock trim size in your formatter (Manusly offers multiple presets).
- Export print PDF and open it at 100% zoom — check edges.
- Validate page count / spine math for the cover separately.
- Upload; if rejected, fix the interior project, do not patch in a random PDF editor.
Cross-link: book layout software and KDP formatting.
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