The book industry, like any other, is rife with jargon and esoteric terminology. Here's a brief rundown of some of the key terms you might encounter. Trim size Selecting a trim size is the first step in book design. Different sizes (5.5 x 8.5 or 6×9) are used for different types of book. If your book is more than 250 pages, a small trim size (5 x 8 or smaller) will create a thicker book and can potentially turn off book buyers. Designers also work with authors to choose forma