This is a towel cap. 【Size】 Length: Approximately 23cm (excluding the ears) Width: Approximately 22cm (measured when laid flat at the elastic part) The description at the time of purchase stated that it is a size that adults can also use. In my subjective opinion, it might be small for those with long hair. A child in elementary school used it a few times for swimming. There are no noticeable stains, as far as I can see, but please understand that this is a used item that a child has used before purchasing.