Definitions for "Trim Size"
Keywords:  hardcover, dimension, size, final, book
Size of a magazine or newspaper after its pages have been printed and trimmed.
The size of a page after it has been trimmed.
The outer dimensions of a finished book. Mass market paperbacks, for instance, are generally 4 1/4 inches by 7 inches. Picture books trim sizes vary tremendously—as does the cost associated with "odd" sizes.