Carry-on Case Accessories: Travel Pouch This pouch has a hook, so it can be used on carry-on cases, strollers, etc. It comes with a hook that can be easily attached to the handle or mounting part with Velcro. Inside the lid, there is a mesh zipper and an inner pocket. There is no pocket on the back. 〈Size〉 Width: Approximately 21cm, Height: Approximately 17cm, Thickness: Approximately 4cm Please note that the size is measured flat by a layman, so there may be some errors. Thank you for viewing!