This is a large bag with a gusset. It's perfect as a sub-bag for school events or for extracurricular activities. It's great for days when children have a lot of belongings, such as for carrying a school bag, gym clothes bag, or art supplies box. Because it's black, it can be used for formal occasions, work, and also as an eco-bag. It has an elegant sheen and uses highly durable nylon satin fabric that is resistant to water and dirt. The fabric is thick enough to resist losing its shape, yet lightweight. It can be folded up small, making it convenient to carry♪ It won't take up much space if you keep it in your bag. It has an inner pocket for storage when folded. 【Size】Approximately 37cm tall x 55cm wide (when laid flat) Gusset: Approximately 19cm