What is the largest perfect bound book you can produce? July 12, 2019 19:46 Updated Follow The largest perfect bound book we can produce is 13" x 10" (open size of 26" x 10"). Related articles What is the thickest perfect bound book you can produce? What is the smallest perfect bound book you can produce? Can I order perfect bound booklets with blank inside pages? How do I calculate the spine of my perfect bound book? What are perfect bound books?