What is a print trim size and why is it selected on the front cover?

The trim size is the final width and height of one printed page after cutting. A print-cover project starts by creating the front at that exact size because the front panel determines the matching back-cover dimensions and the basis of the full paperback layout.

Choose the size required by your printer or publishing platform before carefully positioning text. Changing trim size later can require extra layout work because the cover proportions and safe areas change.