I bought it at Second Street for 98,000 yen. It is definitely authentic. Size is O. Size O Length: 58 cm Width: 47 cm Sleeve length: 60 cm It's a short length, so it's perfect for wearing at the waist. I can add more pictures of the tags if you'd like. Feel free to ask! Please understand that this is a used item, so only those who understand that should purchase it!