Case laminate versus dust jacket
A traditional hardback wraps a printed paper jacket around a plain cloth or paper-covered case. A case-laminate book removes the jacket: the artwork is printed on the sheet that is glued to the boards and sealed under a gloss or matte laminate. The result is durable and jacketless — nothing tears or slides off — which is why print-on-demand services standardized on it. What you lose are jacket flaps, so flap bio text moves onto the back panel or inside the book.
Why the cover sheet is bigger than the book
The printed sheet has to fold around three edges of each board and disappear inside the case, so it extends well beyond the visible cover on every side. Between the spine and each board sits a hinge — a flexible groove that lets the cover open. Artwork must continue through the wrap and hinge areas, but critical content must stay out of them: a face or title that strays into the hinge gets visibly creased on every copy.
Page range and trims are narrower than paperback
KDP paperbacks run from 24 to 828 pages depending on paper, while the case-laminate range is 75 to 550 pages, and only five trim sizes are offered. If the book sits outside those limits, the hardcover edition needs repagination or a different format. Each hardcover edition also needs its own ISBN — it is a separate product from the paperback.
Designing one without guessing the geometry
The workable approach is to design the front, spine, and back as an editable system, then let the production sheet be calculated from the binding, trim, paper, and final page count. Coverfairy builds KDP case-laminate wraps with the board and hinge allowances applied and previews the full sheet while you edit; the exported PDF should still be compared against KDP's generated template for the title before upload.
Sources: Amazon KDP hardcover cover requirements. Reviewed ; recheck the official page before production.