This is a Costco-exclusive eco-bag that can be stored in a small, zippered case. It's a popular item that is difficult to obtain because production has already ended. It's a keychain type with a chain hook, so you can attach it to your bag and carry it around. [Eco-bag Size] Approximately 42cm (H) x 41cm (W) [Storage Case Size] Approximately 7cm (H) x 9cm (W) x 2.5cm (D) It came with the purchase of a Costco cooler bag. I unfolded it to take photos, but it's unused. Although unused, it has been stored at home, so please be aware of this if you are sensitive to such things.