Hello, how many centimeters to make a spine at the cover for printing? This thickness depends on the number of pages in a book.

Hi, the book has 16,000 words and roughly 70 pages (printed back and front leads to 35 pages), so I am estimating max 1 cm or a bit less. Does this help?

Thank you, it helped. And what is the cover, soft or hard?

I think we'll start with a soft cover + ebook.