Well it's tagged a 40R -
shoulders : 50 cm ( 19.7")
armpits : 60 cm ( 23.64")
undersleeve : 44 cm ( 17.34")
total lenght : 105 cm ( 41.37")
Might be a bit big on you but as an overcoat they should have a bit of breathing room.
I'm not hooked on ebay. Maybe I was when I first discovered the world of used/vintage menswear and went a little crazy and made some mistakes. I'm done stupidly spending but I keep an eye on a few sellers that usually have some good items. A lot of times if you just search New with tags or new you can get some good deals on new items marked down. Or if I hear about a new brand I'll check the bay to see whats out there. As in this instance with Sartoria Partenopea and the jacket I posted.
JR: this is a good perspective on EBay. I only find maybe 1-2 jackets a year that are nice quality, a good fit and a smoking deal.