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5,931 Views 2 Replies Last post: Sep 22, 2015 3:42 PM by walton RSS
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Jul 22, 2014
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Sep 22, 2015 11:27 AM

Pixel size for 8 1/2 x 8 1/2 picture book?


I am planning to create a 8 1/2 x 8 1/2 picture book, and wondered what the recommended pixel count should be for the height and width of my digital canvas?  Thanks!

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1. Sep 22, 2015 11:52 AM in response to: AnitaMc
Re: Pixel size for 8 1/2 x 8 1/2 picture book?

Will the pages be full-bleed and are you using CreateSpace to print the book? If so, then I set the dimensions at 2622(w) x 2660(h) pixels -- which is 8.625"x8.75" (i.e., the full-bleed page size) at 304ppi.

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2. Sep 22, 2015 3:42 PM in response to: AnitaMc
Re: Pixel size for 8 1/2 x 8 1/2 picture book?

In the US, most people work in inches.  It's easiest.  However, most graphics programs can make working in any unit of measure easy. Here, "DPI" is more correctly PPI, pixels per inch, but DPI is what most people say, many graphics programs, however, will use PPI.


CS says:

For optimal printing, we suggest that all images for both the c over and interior ar e at least 300 DPI. . . .

Images that ar e less than 200 DPI will be flagged in the Interior Reviewer an d during the file review process so you have the option to r esubmit updated images.

We will not r eject a file for low r esolution images unless ther e is text within the image that is blurry and illegible.

<PDF Submission Specifications, page 23 and 49>

There is no reason you cannot go higher, and often you can go lower will little or no ill-effect: but 300 is the standard.


If you want to determine the size of an image in pixels, multiply the dimension in inches by the resotuion if it is in dpi. E.g. 8.5" x 300px = 2550 px


If your images bleed, that is you intend the image to stop exactly at the edge of a page, it must extend 0.125" beyond that edge. If an image only bleeds off the outside edge of the page, that image will have to extend 0.125" beyond the edge, and that amount will be trimmed off.  AND the page size has to be extended 0.125" on the top, bottom, and outside, regardless of whether something actually bleeds there or not . . . one bleed on one page, all pages must include the bleed.  If your book is 8.5 x 8.5 and if it bleeds, the page/trim size will be 8.625 x 8.75, as Lighthouse indicated above. You will enter the trim size as 8.5 x 8.5, and you will tick that the book bleeds.


I am not sure where the 304 dpi resolution given above comes from, you might want to ask.




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