If you are setting up the design of your own cover, the table below will provide a useful guide to the width of the spine for your book. We recommend that you supply an 'open' file for the cover i.e. a file in the software that you designed it in, so we can do any fine adjustments to the spine size which can sometimes occur before the cover is be printed.

 

 

 

Number of sheets in your book

 

80gsm paper

 

100gsm paper

 

One sheet of paper = 2 pages

Thickness of spine in mm

Thickness of spine in mm

50

5

5.5

75

7.5

8

100

10

10.5

125

13

13.5

150

15.5

16.5

175

18

19

200

20.5

21

225

23

24

250

25

27

275

28

30

300

31

32

325

33.5

35

350

36

38

Spine Size Guide