I have owned it for over 15 years and it was used when I got it. I have worn it a handful of times but it has spent most of its life in my care hanging in a closet. It measure 25" pit to pit and about 31" long so I'm calling it an XL. It has no tag or makers mark I can find or have seen. This is Not a cheap Chinese made coat.
It can Almost pass for the real deal. This thing would keep you warm in Siberia. Ask questions and request photos if you need them.