Dust Jackets: Sizing Spine Wraps, Flaps, and Bleed Margins
Designing a dust jacket? Learn how to calculate spine widths, fold flaps, and format cover files.
Marcus Sterling
Creative Director
"Designing a dust jacket for case-bound hardcovers requires calculating dimensions for flaps, folds, and spine wraps to ensure a perfect fit."
Core Key Takeaways
- Sizing Folds and Flaps for Hardcovers
- Calculating Spine Widths for Page Counts
- Formatting Cover Layouts for Printers
1. Sizing Folds and Flaps for Hardcovers
Standard dust jacket flaps are 3 to 4 inches wide, folding inside the cover boards. Set clear bleed margins to avoid layout shifting.
- Set dust jacket flaps to 3 or 4 inches wide.
- Add 0.125-inch bleed margins to all cover layout files.
- Keep text away from folds to protect layout designs.
2. Calculating Spine Widths for Page Counts
Spine widths depend on your book page count and paper type. Verify paper caliper specs before finalizing designs.
3. Formatting Cover Layouts for Printers
Submit dust jackets as a single flat PDF showing back flap, back cover, spine, front cover, and front flap aligned.
The Takeaway
Dust jackets add a premium look to hardcovers. The design team at Golden Ivory Publishing designs custom jacket covers for authors.
Bring Your Manuscript to Life with Golden Ivory
Schedule a 1-on-1 publishing consultation to discuss your editorial, formatting, design, and distribution roadmap.