I am looking for a leather sport riding jacket. I just recently purchased my first bike so this will be my first coat and I have found a few on ebay that look good, but I don't know what size I need to get. There aren't any stores in the area that have jackets out that I can try on since it's the middle of December in Fargo, but I'd like to get my coat now. I am 6'2", 195 lbs, and fairly slim. I want something that isn't too tight so if need be I could get a couple layers underneath it (Fargo can get kinda cold). Is the sizing pretty consistent between brands (Joe Rocket, Teknic, Firstgear)? Also any suggestions on what kind of coat to get, I want something that I could wear in both the heat and the cold.