6.14 × 9.21 in (6.14x9.21) book size on KDP: specs, page limits and cover size
6.14 × 9.21 in (often written 6.14x9.21; 156 × 233.9 mm) is the UK Royal format, used for non-fiction, textbooks and longer novels. It is a large trim on KDP, offered as a paperback (24–828 pages) and a hardcover (75–550 pages). With bleed, each interior page is 6.265 × 9.46 in.
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6.14 × 9.21 in at a glance
| Trim size | 6.14 × 9.21 in · 156 × 233.9 mm · 15.6 × 23.39 cm |
| Traditional name | Royal (UK), 156 × 234 mm |
| Shape | Portrait |
| Size class | Large trim (wider than 6.12 in and taller than 9 in), higher printing cost |
| Interior page with bleed | 6.265 × 9.46 in · 159.1 × 240.3 mm |
| Bindings | Paperback and hardcover |
| Expanded Distribution | B&W white, Standard color, Premium color |
Page limits by ink and paper
Page counts KDP accepts at 6.14 × 9.21 in, by binding, ink and paper:
| Ink and paper | Paperback pages | Hardcover pages | Spine per page |
|---|---|---|---|
| Black & white · white paper | 24–828 | 75–550 | 0.002252 in |
| Black & white · cream paper | 24–776 | 75–550 | 0.0025 in |
| Black & white · groundwood paper | 24–812 | Not offered | 0.00235 in |
| Standard color · white paper | 72–600 | Not offered | 0.002252 in |
| Premium color · white paper | 24–828 | 75–550 | 0.002347 in |
The 75-page hardcover minimum is 76 pages in practice (odd counts print as the next even one). Spine width at 6.14 × 9.21 in for your page count: spine width calculator.
At 6.14 × 9.21 in, black and white on white paper, standard color and premium color are eligible for Expanded Distribution (40% royalty through bookstores and libraries); black and white on cream paper and black and white on groundwood paper are not.
Eligible doesn’t mean accepted: the books KDP’s distributors don’t take.
Margins and text area at 6.14 × 9.21 in
Widest text block at 6.14 × 9.21 in with KDP’s minimum margins (0.25 in outside, 0.375 in with bleed, and the gutter for the page count):
| Pages | Minimum gutter | Max text width | With bleed |
|---|---|---|---|
| 24–150 | 0.375 in (9.6 mm) | 5.515 in | 5.39 in |
| 151–300 | 0.5 in (12.7 mm) | 5.39 in | 5.265 in |
| 301–500 | 0.625 in (15.9 mm) | 5.265 in | 5.14 in |
| 501–700 | 0.75 in (19.1 mm) | 5.14 in | 5.015 in |
| 701–828 | 0.875 in (22.3 mm) | 5.015 in | 4.89 in |
The text block can be up to 8.71 in tall at 6.14 × 9.21 in (8.46 in with bleed). Every margin to scale: margins and bleed calculator.
Full-wrap cover size at 6.14 × 9.21 in
Full-wrap cover sizes at 6.14 × 9.21 in: the spine, and so the width, grows with the page count and the paper.
Paperback
| Pages | Paper | Spine | Full cover (in) | Full cover (mm) | Spine text |
|---|---|---|---|---|---|
| 100 | B&W white | 0.225 in | 12.755 × 9.46 | 324 × 240.3 | Yes |
| 200 | B&W white | 0.45 in | 12.98 × 9.46 | 329.7 × 240.3 | Yes |
| 300 | B&W white | 0.676 in | 13.206 × 9.46 | 335.4 × 240.3 | Yes |
For 200 pages: 0.125 + 6.14 + 0.45 + 6.14 + 0.125 = 12.98 in wide, and 9.21 + 2 × 0.125 = 9.46 in tall. The bleed is trimmed off after printing.
Hardcover
| Pages | Paper | Spine | Full cover (in) | Full cover (mm) | Spine text |
|---|---|---|---|---|---|
| 100 | B&W white | 0.414 in | 14.269 × 10.627 | 362.4 × 269.9 | Yes |
| 200 | B&W white | 0.639 in | 14.494 × 10.627 | 368.2 × 269.9 | Yes |
| 300 | B&W white | 0.865 in | 14.719 × 10.627 | 373.9 × 269.9 | Yes |
A hardcover cover is larger than the page: each board is 5 mm wider and 6 mm taller than the trim, the spine adds 4.8 mm to the paper, and the art wraps 15 mm around every edge. Keep text out of the 10 mm hinge next to the spine.
KDP prints spine text only on books with more than 79 pages. kdpbook also checks that the spine is wide enough for 7 pt text inside KDP's 0.0625 in spine margins, which in black and white on white paper takes 100 pages.
Exact size and a PNG or SVG template for your page count: cover size calculator.
Printing cost at 6.14 × 9.21 in on Amazon.com
Amazon.com printing cost at 6.14 × 9.21 in in US dollars, with the lowest list price KDP accepts:
Paperback
| Pages | B&W white | Premium color |
|---|---|---|
| 100 | $2.84 flat fee · min. list price $5.68 | $9.00 min. list price $15.00 |
| 300 | $6.10 min. list price $10.17 | $25.00 min. list price $41.67 |
Hardcover
| Pages | B&W white | Premium color |
|---|---|---|
| 100 | $7.49 flat fee · min. list price $12.48 | $13.65 min. list price $22.75 |
| 300 | $10.75 min. list price $17.92 | $29.65 min. list price $49.42 |
On Amazon.com, black-and-white paperbacks up to 108 pages (the limit in KDP's own calculator; the KDP Help page says 110) and premium color up to 40 pages pay a flat printing fee; above that, the cost is a fixed fee plus a price per page. Standard color is always fixed fee plus per page.
6.14 × 9.21 in is a large trim (wider than 6.12 in and taller than 9 in), so it prints at KDP's large-trim rate: a 300-page black-and-white paperback costs $6.10 to print on Amazon.com, against $4.60 at 6 × 9 in, a regular trim. That is $1.50 more per copy.
Every marketplace: printing cost calculator. What a copy earns: royalty calculator.
How many pages will your manuscript fill?
- An 80,000-word novel comes to about 228 pages at 6.14 × 9.21 in with 11 pt body text (242 at 6 × 9 in), for a 0.57 in spine on cream paper.
- A 50,000-word non-fiction guide comes to about 164 pages at 6.14 × 9.21 in with 11 pt body text (174 at 6 × 9 in), for a 0.369 in spine on white paper.
These are kdpbook’s own layout estimates, front and back matter included. Try your word count and font size in the word count to page count calculator.
When to choose 6.14 × 9.21 in
- It is only 0.14 in wider and 0.21 in taller than 6 × 9 in, but that is enough to make it a large trim, so every copy costs more to print (see the comparison above).
- Imprint Digital's UK size guide lists Royal for textbooks, business and reference books. The larger page fits more words, so a long manuscript comes to slightly fewer pages than at 6 × 9 in.
kdpbook book types at 6.14 × 9.21 in
No kdpbook book type starts at 6.14 × 9.21 in by default, but you can choose it when you set up a book.
You can also choose 6.14 × 9.21 in for novel, non-fiction guide, self-help book, business book and memoir & family history.
Whatever the size, kdpbook lays out the pages, margins, images and full-wrap cover for it, and reflows the book if you change the trim later. kdpbook is independent and not affiliated with Amazon.
6.14 × 9.21 in questions
How many pages can a 6.14 × 9.21 in book have on KDP?
As a paperback: 24–828 pages in black and white on white paper, 24–776 pages in black and white on cream paper, 24–812 pages in black and white on groundwood paper, 72–600 pages in standard color and 24–828 pages in premium color. As a hardcover: 75–550 pages in black and white on white paper, black and white on cream paper or premium color. KDP counts every page, blank ones included, and rounds an odd count up to the next even number.
What cover size does a 6.14 × 9.21 in book need on KDP?
It depends on the page count and the paper, because the spine grows with every page. A 200-page 6.14 × 9.21 in paperback in black and white on white paper needs a full-wrap cover of 12.98 × 9.46 in (329.7 × 240.3 mm): back and front at 6.14 in each, a 0.45 in spine and 0.125 in of bleed on the outside edges.
Can a 6.14 × 9.21 in book be a hardcover on KDP?
Yes. 6.14 × 9.21 in is one of KDP's 5 hardcover sizes (5.5 × 8.5, 6 × 9, 6.14 × 9.21, 7 × 10, 8.25 × 11 in). A hardcover takes 75–550 pages in black and white on white paper, black and white on cream paper or premium color. KDP hardcovers are case laminate: the art is printed on the cover itself, and there is no dust jacket.
Is 6.14 × 9.21 in the same as the UK Royal format?
Yes, to the nearest millimeter: Royal (UK) is 156 × 234 mm, and 6.14 × 9.21 in is 156 × 233.9 mm. On KDP you choose it as 6.14 × 9.21 in.