This is a monkey bag from "Tabekko Doubutsu" (a Japanese animal cracker brand). It has a zipper to store small items. I bought it at an event and used it until I got home. - Zipper: Has a zipper on the back - Strap: Comes with a red strap - Size: Approximately 35cm in height and diameter I took a picture of the monkey bag with an A4 file to show its size (see photo).