This is a polo shirt from Ralph Lauren's RLX sports line. It's size XS, but it runs large. I usually wear S to M size in Nike or Adidas. The material feels very nice against the skin, and it's made of high-quality fabric, so I highly recommend it. I tried it on, but I haven't had a chance to wear it because I wear other clothes more often, which is a waste, so I'm selling it to someone who will cherish it. - Brand: RLX - Size: XS (runs large) - Color: Blue Thank you for looking.