Authentic and very chic! This isn't your easily faked and common triangle logo Prada hat, but a more minimalist piece of headwear, with subtle logoing. Medium size here means 21" around the head. Has very faint discoloring in one spot from being hit in paintball, but I cleaned it up. Otherwise very good condition, one of the sewn corners of the inner tag is unravelled. Retail was about $400 I think?