The size is S. I bought this for my niece when she was in elementary school, but she had outgrown it by the time I gave it to her, so she never used it. It was only tried on. There is no box, so I will send the item as is. Please search the manufacturer's website for detailed size and function information. Since it has been stored at home and tried on, if you are looking for something in perfect condition like new, please buy a new one. Returns and complaints are not accepted. Thank you.