Only print books need a trim size. It indicates a book’s
dimensions in height, width and depth. Trim size is good for retailers
to know when fitting books on shelves. When it comes to size most
genres follow a certain norm. Libraries and bookstores may not
choose a book with extreme physical dimension because of the
challenge to shelve it. But a book size that is a bit out of its genre
norms may help it to be noticed. You can check what’s already on
the shelves in your book’s genre at your local bookstore and library.
Information that goes on the book cover- front, back, and spine
is also metadata. Also, there’s a specific set of information needed
when filling in the request form on the IngramSpark Book Cover
Template Generator page. Here are the pieces of metadata you’ll be
asked to provide: ISBN, trim size, page count, and price (optional).