Webto find out the exact dimensions of your cover, use the calculator.
You can also download a template (pdf and png) to be used as a guide layer in your image editing software.
Webyou can choose from a variety of trim sizes (check the table below for a list of common trim sizes, as well as minimum and maximum page count by size).
The most common trim size for books in the u. s.
Is 6 x 9 (152. 4 x 228. 6 mm) and is a regular trim size.