New to the Fedora Lounge and interested in adding to my collection of Jackets. I do ride (Ducati Diavel/BMW Adventure) but looking mostly for casual wear in the Race Cafe type jackets. Short of measuring everything precisely, I wonder if anyone might have advice about how a size 40 translates into Aero, Vance, and Schott jackets. For example, I have a Schott 641HH in 42 (this is the slim cut model so wears like 40) that fits me very well. I'm wondering if this might be translated into a Aero RC/Board racer, or Vance Comet. Looking forward to your reply and guidance.