Sofia the First Mini Backpack for Kids - 11" Disney Backpack Purse for Girls with Adjustable Shoulder Straps | Sofia the First Small Bag. This Sofia the First school bag features an 11" backpack with adjustable shoulder straps and top loop for hanging, featuring colorful artwork of Sofia the First. Show off your love of Sofia the First in style! This mini backpack is sure to be a hit with Sofia the First fans and is perfect to take with you to school, on vacation, or anywhere else. This Sofia the First backpack and travel set is great to include in a Sofia the First set for kids and adults alike. Officially licensed Sofia the First mini backpack is perfect for Sofia the First fans, boys and girls, kids and adults alike. WARNING: CHOKING HAZARD—Small parts. Not for children under 3 yrs.