Thank you for viewing. This is a Hot Biscuits pochette. The size is approximately 18cm wide x 11.5cm high x 5.5cm deep. It's denim-style, so it's easy to coordinate with any outfit! Also, the shoulder strap is adjustable, so I think you can use it for a long time (*´ω｀*) It also has a gusset and one inner pocket. How about it for your child?