Question: what are common book sizes?
Answer: Fiction: 4.25 x 6.87, 5 x 8, 5.25 x 8, 5.5 x 8.5, 6 x 9. Novella: 5 x 8. Children's: 7.5 x 7.5, 7 x 10, 10 x 8. Textbooks: 6 x 9, 7 x 10, 8.5 x 11. Non-fiction: 5.5 x 8.5, 6 x 9, 7 x 10" Memoir: 5.25 x 8, 5.5 x 8.5. Photography: Whatever you see fit!