SpongeBob Backpack for Kids - SpongeBob School Backpack Bundle Includes 16" SpongeBob Backpack, Water Bottle, Stickers, More | SpongeBob Merchandise. This SpongeBob school backpack features adjustable shoulder straps, a zip closure compartment, and a top loop for conveniently hanging. This SpongeBob backpack features colorful 3-D artwork of SpongeBob and Patrick. The SpongeBob backpack measures approximately 16" x 12" x 5". This SpongeBob backpack for kids has plenty of space for SpongeBob folders, notebooks, and books. The front accessory pocket is perfect for holding SpongeBob pencils, pens, school supplies, toys, snacks, and more. This durable SpongeBob backpack for kids also comes with bonus SpongeBob stickers, a Beach Kids water bottle, and a Beach Kids door hanger! Officially licensed SpongeBob backpack school set for kids. This SpongeBob backpack is perfect to pair with other SpongeBob school supplies.