Knowledge · Rule
Full wrap size does not match trim + spine + bleed
Cover · C-TRIM
Definition
The uploaded cover canvas or PDF page box does not match the expected KDP full-wrap size for your trim, spine width, and bleed settings.
Why
- Design exported at trim-only size instead of full wrap (back + spine + front + bleed).
- Wrong trim size selected vs interior PDF (e.g. 6×9 vs 5.5×8.5).
- Spine width outdated after page count or paper type changed.
- PDF page box (MediaBox) left at a template size that no longer matches KDP calculator output.
Impact
May block submission on KDP when this rule fails.
Platforms
| Platform | Result |
|---|---|
| KDP | May reject |
| Apple Books | Unknown |
| Google Play | Unknown |
| Kobo | Unknown |
References
- KDP paperback cover calculator
- Cermify cover engine — C-TRIM
Last updated · 2026-08-03
Why we believe
Provenance is loaded from RID (same source as Rule Radar) — not a second copy.
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