The Skip*Hop Expo Diaper Bag in Red was built to functions in two sizes! With the zipper closed, is similar in size to the Skip Hop Duo. The bag grows by 50% with the zipper open. The Skip*Hop Expo can either hang from a stroller or be worn over the shoulder. It has adjustable stroller bar straps as well as an adjustable and removable shoulder strap. An ample rear pocket holds a changing pad and extra diapers. The main compartment of the diaper bag is roomy with an internal divider.  Additional features include: Two convenient front pouch pockets including covered pocket with cell phone holder  Easy access zippered pockets keep personal items safe and dry Two interior bottle/organizer pockets  Easy access pen holders  Key fob in main zippered compartment Extremely durable PVC backed 600 denier poly-canvas Dimensions when closed: 13inw x 14inh x 3 1/2ind (when open, the bottom of the bag expands to 7in wide)