Children’s Book Dimensions by Age Group: Complete 2026 Guide

The standard children’s book dimensions are 6″ x 6″ for board books (ages 0-2), 8.5″ x 8.5″ for picture books (ages 3-5), 6″ x 9″ for early readers (ages 6-8), and 5.25″ x 8″ for chapter books (ages 9-12). Amazon KDP does not support landscape orientations, and neither KDP nor IngramSpark prints true board books.