This is a convenient mother's backpack that allows you to open the zipper and take out the contents while still wearing it☆ Approximately: Height 25cm, Width 25cm, Thickness 11cm It doesn't look like a very large backpack, but it can hold a lot of things and feels light♩ I am selling it because I no longer use it^_^! I'd be happy if it sold out by the end of the year, so I'm offering it at a low price!! Thank you for looking☆