Leaf & Spine

5.06 x 7.81 in · 170 pages

170-page 5.06 x 7.81 in book: spine width & cover size

A 170-page 5.06 x 7.81 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: 10.753 x 8.06 in.

0.383 inSpine, white paper9.72 mm
0.425 inSpine, cream paper10.8 mm
10.75 x 8.06Full cover, inchesincl. bleed
176 gEstimated weight6.2 oz

Cover template (white paper)

Barcode areaBACK COVER5.06 x 7.81 inFRONT COVER5.06 x 7.81 inSPINE 0.383 inFull cover 10.753 x 8.06 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 mm10.753 x 8.06 in273.1 x 204.7 mm3,226 x 2,418 px
Cream paper, black ink0.425 in10.8 mm10.795 x 8.06 in274.2 x 204.7 mm3,238 x 2,418 px
Standard color (white)0.3828 in9.72 mm10.753 x 8.06 in273.1 x 204.7 mm3,226 x 2,418 px
Premium color (white)0.399 in10.13 mm10.769 x 8.06 in273.5 x 204.7 mm3,231 x 2,418 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 10.753 x 8.06 in — or 3,226 x 2,418 px at 300 ppi.
  • The back cover runs from the left edge to 5.185 in; the spine from 5.185 to 5.568 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 in10.618 x 8.06 in
120 pages0.2702 in0.3 in10.64 x 8.06 in
130 pages0.2928 in0.325 in10.663 x 8.06 in
140 pages0.3153 in0.35 in10.685 x 8.06 in
150 pages0.3378 in0.375 in10.708 x 8.06 in
160 pages0.3603 in0.4 in10.73 x 8.06 in
180 pages0.4054 in0.45 in10.775 x 8.06 in
190 pages0.4279 in0.475 in10.798 x 8.06 in
200 pages0.4504 in0.5 in10.82 x 8.06 in
210 pages0.4729 in0.525 in10.843 x 8.06 in
220 pages0.4954 in0.55 in10.865 x 8.06 in
230 pages0.518 in0.575 in10.888 x 8.06 in

170 pages in other trim sizes

TrimSpine (white)Full cover (white)
5 x 8 in0.3828 in10.633 x 8.25 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 x 10 in0.3828 in16.633 x 10.25 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 5.06 x 7.81 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: 10.753 x 8.06 in (273.1 x 204.7 mm) including 0.125 in bleed on every side. For cream paper: 10.795 x 8.06 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 5.06 x 7.81 in paperback?
About 176 g (6.2 oz) on white paper with a standard cover — useful for estimating postage.