This is a navy blue swim cap from Central Swimming. Although it's not written on it, I believe it's size M. Only the last name is faintly written on the tag. There is considerable wear and tear, such as fading and the rubber part. I have checked the lowest price at the time of listing. Please only purchase if you prioritize the price. The envelopes, boxes, paper bags, and shopping bags used for shipping are mostly recycled and used. Thank you for your understanding.