Medium Backpack w/ PocketThis backpack has plenty of room for books, folders, and a water bottle in the side pocket. It is easy enough for 3 year olds to carry yet roomy enough to last through the tween years. Parents love it tooit even doubles as a diaper bag. And since we can personalize it, this bag makes a thoughtful and practical gift Measurements: 15 x 15 x 6 100% washable. Put in the washer on the delicate cycle, cold water, and lay flat or hang to dry.