I need some input here. I want to purchase a Prince Charlie jacket and vest. Unfortunately, there are no shops in my area to try on a particular size. I hate doing things via the internet, but might have to.

I've read on several merchants' sites that most PC's are cut narrow and one should go up one size. Say I'm a 42R, then I should go up to 44R !???? I'm sure not all manufacturers are the same, but are they close to true size? Any information would be MORE than welcome HELP!!!!