Leaf & Spine

8 x 10 in · 170 pages

170-page 8 x 10 in book: spine width & cover size

A 170-page 8 x 10 in paperback has a spine of 0.3828 in (9.72 mm) on white paper or 0.425 in on cream. Full cover with bleed: 16.633 x 10.25 in.

0.383 inSpine, white paper9.72 mm
0.425 inSpine, cream paper10.8 mm
16.63 x 10.25Full cover, inchesincl. bleed
355 gEstimated weight12.5 oz

Cover template (white paper)

Barcode areaBACK COVER8 x 10 inFRONT COVER8 x 10 inSPINE 0.383 inFull cover 16.633 x 10.25 in incl. 0.125 in bleed
Red: bleed (trimmed off) · dashed: 0.25 in safe zone · shaded: spine. Download a full-size template from the calculator.

Spine and cover by paper type

PaperSpineSpine (mm)Full cover (in)Full cover (mm)At 300 ppi
White paper, black ink0.3828 in9.72 mm16.633 x 10.25 in422.5 x 260.4 mm4,990 x 3,075 px
Cream paper, black ink0.425 in10.8 mm16.675 x 10.25 in423.5 x 260.4 mm5,002 x 3,075 px
Standard color (white)0.3828 in9.72 mm16.633 x 10.25 in422.5 x 260.4 mm4,990 x 3,075 px
Premium color (white)0.399 in10.13 mm16.649 x 10.25 in422.9 x 260.4 mm4,995 x 3,075 px

Per-page factors are those published by KDP; IngramSpark and offset printers use their own paper calipers.

Other printers: spine by paper PPI

Paper PPITypical stockSpineSpine (mm)
350 PPIBulky / heavy stock (~70 lb text)0.4857 in12.34 mm
400 PPICream book paper (~55 lb)0.425 in10.8 mm
444 PPIWhite book paper (~50 lb)0.3829 in9.73 mm
500 PPILightweight text (~45 lb)0.34 in8.64 mm
600 PPIThin text (~40 lb)0.2833 in7.2 mm

If your printer quotes pages per inch (PPI), spine = pages ÷ PPI. Ask for the exact PPI of your chosen stock.

Designing this cover

  • Build the cover canvas at 16.633 x 10.25 in — or 4,990 x 3,075 px at 300 ppi.
  • The back cover runs from the left edge to 8.125 in; the spine from 8.125 to 8.508 in; the front cover after that.
  • Spine text is allowed — centre it and keep 0.0625 in clear on each side.
  • Keep titles and faces at least 0.25 in inside the trim; KDP places the barcode in a 2 x 1.2 in area at the lower right of the back cover.
  • Export as a flattened PDF (PDF/X-1a is safest) with fonts embedded.

Nearby page counts

PagesSpine (white)Spine (cream)Full cover (white)
110 pages0.2477 in0.275 in16.498 x 10.25 in
120 pages0.2702 in0.3 in16.52 x 10.25 in
130 pages0.2928 in0.325 in16.543 x 10.25 in
140 pages0.3153 in0.35 in16.565 x 10.25 in
150 pages0.3378 in0.375 in16.588 x 10.25 in
160 pages0.3603 in0.4 in16.61 x 10.25 in
180 pages0.4054 in0.45 in16.655 x 10.25 in
190 pages0.4279 in0.475 in16.678 x 10.25 in
200 pages0.4504 in0.5 in16.7 x 10.25 in
210 pages0.4729 in0.525 in16.723 x 10.25 in
220 pages0.4954 in0.55 in16.745 x 10.25 in
230 pages0.518 in0.575 in16.768 x 10.25 in

170 pages in other trim sizes

TrimSpine (white)Full cover (white)
5 x 8 in0.3828 in10.633 x 8.25 in
5.06 x 7.81 in0.3828 in10.753 x 8.06 in
5.25 x 8 in0.3828 in11.133 x 8.25 in
5.5 x 8.5 in0.3828 in11.633 x 8.75 in
6 x 9 in0.3828 in12.633 x 9.25 in
6.14 x 9.21 in0.3828 in12.913 x 9.46 in
6.69 x 9.61 in0.3828 in14.013 x 9.86 in
7 x 10 in0.3828 in14.633 x 10.25 in
7.5 x 9.25 in0.3828 in15.633 x 9.5 in
8.5 x 8.5 in0.3828 in17.633 x 8.75 in
8.5 x 11 in0.3828 in17.633 x 11.25 in

Spine width depends only on page count and paper; the cover width changes with the trim.

Frequently asked questions

How wide is the spine of a 170-page 8 x 10 in book?
On white paper it is 0.3828 in (9.72 mm); on cream paper 0.425 in (10.8 mm), using KDP's per-page factors.
What size should the full cover be?
For white paper: 16.633 x 10.25 in (422.5 x 260.4 mm) including 0.125 in bleed on every side. For cream paper: 16.675 x 10.25 in.
Can I put text on the spine?
Yes. KDP allows spine text only for books with more than 79 pages; keep it at least 0.0625 in (1.6 mm) from each spine edge.
How heavy is a 170-page 8 x 10 in paperback?
About 355 g (12.5 oz) on white paper with a standard cover — useful for estimating postage.