I'd be wary to declare that you are one exact size in EG because things change season to season and piece to piece. If the cut of that jacket is similar to the one they did last season it runs a bit big. I've found I'm all over the board for EG. I could be a medium in outerwear (I have a large in that jacket but I could have taken a medium), a medium or large in shirts and an XL in sportcoats. Just saying, there's no real science to it.