KDP spine width and cover size

White paper

0.002252 in per page

Cream paper

0.0025 in per page

Groundwood

0.00235 in per page

Colour interior

0.002347 in per page

Bleed

0.125 in on the outside edges

Spine text

Only above 80 pages

Source

• KDP help: Paperback cover creation, spine width. Last checked Oct 2026. Not affiliated with Amazon.

More KDP rules

• KDP margins and gutter for puzzle books

  The inside margin grows with the page count so text is not lost in the binding.

• KDP page count limits by trim and paper

  Minimum and maximum page counts depend on trim size, paper and ink.

• KDP fonts, lines and image rules

  Small details that cause rejections: unembedded fonts, hairlines and pale greys.

• Large print puzzle books on KDP

  Large print means readable type. The studio blocks the label until the text size is met.