Whimsical backpacks for your imaginative little one. Horizontal design with ergonomic attributes is designed to carry weight at waist level and take the stress off of your child's back. Spacious, with 7 interior pockets for organization, interior ID card, and exterior pockets for easy access to small items and water bottles. Small sizes perfect for 3 to 5 year old kids between 36 and 42 inches tall. Medium sizes perfect for 5 to 7 year old kids between 43 and 49 inches tall.