Popular Book Trim Sizes for Fiction and Nonfiction Self-Published Books See the standard book sizes that are popular and recommended for self-publishing fiction and non-fiction authors. Read More Authors, PublishingDaniel J. TortoraJanuary 10, 2022nonfiction, Amazon KDP, blurb, trim size, book design, print books, self-publishing, Barnes & Noble Press, author tips, BookBaby, Lulu