Pick your book type to see the recommended KDP trim size and matching BISAC subject categories — verified against Amazon KDP and the Book Industry Study Group.
Amazon KDP supports 16 paperback trim sizes in the US catalog as of 2026, verified directly against KDP's own "Set Trim Size, Bleed, and Margins" help page. Five are regular trim sizes; the other eleven are "large trim sizes" (wider than 6.12" or taller than 9"), which cost more per page to print.
| Trim Size | Category | Typical Page Range | Common Use |
|---|---|---|---|
| 5" x 8" | Regular | 24–828pp | Compact journals, pocket planners |
| 5.06" x 7.81" | Regular | 24–828pp | Compact paperback novels |
| 5.25" x 8" | Regular | 24–828pp | Slim novels, journals |
| 5.5" x 8.5" | Regular | 24–828pp | Digest-size planners, novellas |
| 6" x 9" | Regular | 24–828pp | Most popular — journals, workbooks, trade fiction |
| 6.14" x 9.21" | Large | 24–828pp | Royal — premium trade paperback |
| 6.69" x 9.61" | Large | 24–828pp | Larger workbooks |
| 7" x 10" | Large | 24–828pp | Planners, guided journals |
| 7.44" x 9.69" | Large | 24–828pp | Manuals, guides |
| 7.5" x 9.25" | Large | 24–828pp | Workbooks, course books |
| 8" x 10" | Large | 24–828pp | Activity books, coloring books |
| 8.25" x 6" | Large | 24–800pp | Landscape-style planners |
| 8.25" x 8.25" | Large | 24–800pp | Square coloring / kids books |
| 8.5" x 8.5" | Large | 24–590pp | Square planners, coloring books |
| 8.5" x 11" | Large | 24–590pp | Letter-size planners, workbooks, coloring books |
| 8.27" x 11.69" (A4) | Large | 24–780pp | A4-format planners and workbooks |
Page ranges shown are for black-ink paperback on white paper; cream paper and color-ink options have slightly narrower maximum page counts. Always confirm the exact range for your chosen paper/ink combination in KDP's title setup before finalizing your interior.
BISAC (Book Industry Standards and Communications) subject codes are maintained by the Book Industry Study Group (BISG) and used industry-wide to classify books. The codes below are copied directly from BISG's current published subject heading lists for the categories most relevant to Craftific's KDP sellers — self-help/journaling, games & activities, business/reference, and general fiction.
| Book Type | Primary BISAC | Common Secondary BISAC |
|---|---|---|
| Journal | SEL045000 — SELF-HELP / Journaling | GAM021000 — GAMES & ACTIVITIES / Guided Journals |
| Planner | REF035000 — REFERENCE / Planners | BUS088000 — BUSINESS & ECONOMICS / Time Management |
| Adult Coloring Book | GAM019000 — GAMES & ACTIVITIES / Coloring Books | GAM020000 — GAMES & ACTIVITIES / Activity Books |
| Notebook | REF015000 — REFERENCE / Personal & Practical Guides | BUS088000 — BUSINESS & ECONOMICS / Time Management |
| Puzzle / Activity Book | GAM007000 — GAMES & ACTIVITIES / Puzzles | GAM014000 — GAMES & ACTIVITIES / Word & Word Search |
| Budget Tracker | BUS050010 — BUSINESS & ECONOMICS / Personal Finance / Budgeting | BUS088000 — BUSINESS & ECONOMICS / Time Management |
| Fiction (novel) | FIC000000 — FICTION / General | Pick a specific genre code (e.g. FIC009000 Fantasy, FIC027000 Romance) for better discoverability |
| Nonfiction (general) | No single universal code — BISAC has no catch-all "Nonfiction" category | Use the closest topical "General" code, e.g. SEL000000, BUS000000, or REF000000 |
Codes verified against the Book Industry Study Group's current published subject headings (bisg.org) for SELF-HELP, GAMES & ACTIVITIES, BUSINESS & ECONOMICS, and REFERENCE. BISAC updates its list roughly once a year (typically late October/November) — always cross-check against bisg.org's free lookup before finalizing your KDP listing.
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