Disney Sofia the First Backpack Toddler 11" Your little one will be ready for any adventure with this Disney Sofia the First preschool backpack. Colorful design featuring Sofia the First! Zip closure. Adjustable shoulder straps. Top loop for hanging. Disney Junior Sofia the First mini backpack measures 11 inches by 9 inches by 4 inches. Just the right size for preschool children. Officially licensed Disney Sofia the First school supplies product.