I purchased this at the Gucci store in Shibuya, but I haven't used it, so I'm selling it while it's still new and unused. I didn't intend to sell it, so I don't have the tags. I think it's probably a size M, but it's reversible and doesn't have a size tag. It seems that until recently, hats could be authenticated, but it's not possible now. I bought it because I liked it, so I'm a little hesitant to sell it. Therefore, I can't offer a significant discount.