Trade paperbacks, a pretty loose category of books, are often in the 5-1/2″ x 8-1/2″ to 6″ x 9″ range. This page proportion—for instance in the 6″ x 9″ size—of 2:3 has long been considered an ideal for a book page, and you can create good looking books at different sizes but in the same page proportions. You can choose from a variety of trim sizes (see the table below for a list of sizes, as well as minimum and maximum page count by size). The most common trim size for paperbacks in the U.S. is 6" x 9" (15.24 x 22.86 cm). When setting up your book, this is the default in the "Print Options" section of the Paperback Content tab. Trade Paperback Sizes & Graphic Novel Industry Standards In the world of comics, trade paperbacks refer to collections of stories reprinted in a new format. Oftentimes, they encompass a single story arc adapted from an original comic book.