Thomas the Train Rolling Backpack - Full Size Thomas Wheeled Backpack (Blue Color) full size backpack measures approx: 11.5"L x 5.5"W x 18.5"H (recommended for ages 6+). includes 1 large zipper pocket in the front, 2 velcro pockets on the side for easy convenient organizing telescope handle raises approx. 14" along with smooth luggage style wheels for easy maneuvering, and adjustable shoulder straps for a comfortable carry made from durable polyester canvas material, easy to clean/maintain