Height: Approximately 10 cm Width: Approximately 21 cm A trio set will fit inside. (The trio set in the photo is a sample.) The inside uses Velcro, making it easy for children to open and close. A name tag service is available on the back. Also, the inside is made of waterproof 100% polyester fabric, processed to prevent water from passing through. * If you want to iron it, you need to be careful not to apply heat directly, such as by using a pressing cloth. This is a handmade item. Each one is made carefully, but as it is made by an amateur, there may be slight stitching errors, pattern misalignments, or distortions. Please purchase only if you understand this. Even if you comment, the person who purchases first will be given priority. Thank you.