I received this as a gift when I purchased Calpis, but my child is in elementary school, so we didn't use the Anpanman item. I think it would be suitable for children around the ages of three or four. It's just the right size for a sandwich. The lid is pink and the bottom is purple, so I think it's designed for girls. It can be folded, so it becomes compact. I haven't opened it, so I don't know the exact size.