Used for one season. It's a backpack type and can be worn over a school bag (randoseru). It also has a hook to hang it up. The bottom part is separated from the top, and you can put things like beach sandals in it. There are some magic marker marks on the back because I put a plastic bag with my name written on it with a magic marker inside. You can see them a little from the front if you look closely. Please check the photos. Bottom: Approximately 16cm x 27cm Height: Approximately 38cm