How wide is the spine of a 100-page 8.5 x 8.5 paperback?
For black ink on white paper, the calculated spine is 0.2252 inches. Cream and color papers have different thicknesses; choose the paper that matches your final interior.
8.5 × 8.5 KDP paperback cover sizes
Choose the final interior page count and paper. The table shows calculated design-guide dimensions, not an Amazon-approved cover. Changing either input changes the spine.
A 100-page example
At 100 pages on black-ink white paper, the spine is 0.2252 inches. The full cover is 17.4752 × 8.75 inches, including the outer bleed. The back and front are each 8.5 × 8.5 inches before bleed.
Page count means physical interior pages, including front matter and blank reverses, not sheets or unique illustrations. Do not round a draft count into a publishing decision; finalize the interior first.
Common page counts and paper choices
Standard color combinations below 72 pages are omitted. This sample covers even counts up to 300 only. Confirm the exact trim, ink and paper combination in the official template generator before production.
| Pages | Paper / ink | Spine | Full cover | Pixels at 300 DPI |
|---|---|---|---|---|
| 24 | Black ink / white paper | 0.0540 | 17.3040 × 8.75 | 5191 × 2625 |
| 24 | Black ink / cream paper | 0.0600 | 17.3100 × 8.75 | 5193 × 2625 |
| 24 | Premium color / white paper | 0.0563 | 17.3063 × 8.75 | 5192 × 2625 |
| 48 | Black ink / white paper | 0.1081 | 17.3581 × 8.75 | 5207 × 2625 |
| 48 | Black ink / cream paper | 0.1200 | 17.3700 × 8.75 | 5211 × 2625 |
| 48 | Premium color / white paper | 0.1127 | 17.3627 × 8.75 | 5209 × 2625 |
| 72 | Black ink / white paper | 0.1621 | 17.4121 × 8.75 | 5224 × 2625 |
| 72 | Black ink / cream paper | 0.1800 | 17.4300 × 8.75 | 5229 × 2625 |
| 72 | Standard color / white paper | 0.1621 | 17.4121 × 8.75 | 5224 × 2625 |
| 72 | Premium color / white paper | 0.1690 | 17.4190 × 8.75 | 5226 × 2625 |
| 80 | Black ink / white paper | 0.1802 | 17.4302 × 8.75 | 5229 × 2625 |
| 80 | Black ink / cream paper | 0.2000 | 17.4500 × 8.75 | 5235 × 2625 |
| 80 | Standard color / white paper | 0.1802 | 17.4302 × 8.75 | 5229 × 2625 |
| 80 | Premium color / white paper | 0.1878 | 17.4378 × 8.75 | 5231 × 2625 |
| 100 | Black ink / white paper | 0.2252 | 17.4752 × 8.75 | 5243 × 2625 |
| 100 | Black ink / cream paper | 0.2500 | 17.5000 × 8.75 | 5250 × 2625 |
| 100 | Standard color / white paper | 0.2252 | 17.4752 × 8.75 | 5243 × 2625 |
| 100 | Premium color / white paper | 0.2347 | 17.4847 × 8.75 | 5245 × 2625 |
| 120 | Black ink / white paper | 0.2702 | 17.5202 × 8.75 | 5256 × 2625 |
| 120 | Black ink / cream paper | 0.3000 | 17.5500 × 8.75 | 5265 × 2625 |
| 120 | Standard color / white paper | 0.2702 | 17.5202 × 8.75 | 5256 × 2625 |
| 120 | Premium color / white paper | 0.2816 | 17.5316 × 8.75 | 5259 × 2625 |
| 200 | Black ink / white paper | 0.4504 | 17.7004 × 8.75 | 5310 × 2625 |
| 200 | Black ink / cream paper | 0.5000 | 17.7500 × 8.75 | 5325 × 2625 |
| 200 | Standard color / white paper | 0.4504 | 17.7004 × 8.75 | 5310 × 2625 |
| 200 | Premium color / white paper | 0.4694 | 17.7194 × 8.75 | 5316 × 2625 |
| 300 | Black ink / white paper | 0.6756 | 17.9256 × 8.75 | 5378 × 2625 |
| 300 | Black ink / cream paper | 0.7500 | 18.0000 × 8.75 | 5400 × 2625 |
| 300 | Standard color / white paper | 0.6756 | 17.9256 × 8.75 | 5378 × 2625 |
| 300 | Premium color / white paper | 0.7041 | 17.9541 × 8.75 | 5386 × 2625 |
Download the matching local guide
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24 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
24 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
24 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
48 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
48 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
48 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
72 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
72 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
72 pages — Standard color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
72 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
80 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
80 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
80 pages — Standard color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
80 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
100 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
100 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
100 pages — Standard color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
100 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
120 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
120 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
120 pages — Standard color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
120 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
200 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
200 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
200 pages — Standard color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
200 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
300 pages — Black ink / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
300 pages — Black ink / cream paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
300 pages — Standard color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
300 pages — Premium color / white paper
Free paperback template download
PDF at the calculated physical size, or a PNG with 300 DPI metadata. No login, upload or credits. This is a design guide, not a finished cover or Amazon approval.
Local downloads: listed paperback trims, even page counts, 24–300 pages (standard color: 72–300; A4 unavailable).
Hardcover, groundwood, custom trim, other page counts or reading directions: get the matching PDF/PNG from Amazon's free template generator. Hardcover uses different boards, hinges and wrap; it is not a paperback enlargement.
Frequently asked questions
What is the full cover size for an 8.5 x 8.5 KDP paperback?
At 100 pages on black-ink white paper, the wrap is 17.4752 × 8.75 inches, including outer bleed. The width is twice the trim width plus the spine plus 0.25 inches. Change the final page count or paper and recalculate.
What pixel size is an 8.5 x 8.5 cover at 300 DPI?
The 100-page black-ink white-paper example is 5243 × 2625 pixels at 300 DPI. This is the full wrap, not a single front-cover image. Pixel dimensions alone do not prove that source artwork has sufficient detail.
What these dimensions do not prove
This is paperback geometry. It is not a hardcover layout, interior-margin calculation or proof that source artwork has enough detail. Templates guide placement; they are not completed cover art.
Confirm the final combination in Amazon’s template generator, review the final PDF in Print Previewer and check a physical proof.
Cover requirements checked October 2, 2026: KDP paperback cover requirements and paperback trim and paper limits checked October 3, 2026.
Calculate another supported combination