Suit question for the experts.... How much chest allowance (ie. excess room above your actual chest measurement) in a suit would you consider to be standard? slim fit? extra slim fit? I read that standard allowance is 4". So, for example, a 38 suit jacket would have an actual garment chest measurement of 42". I am wondering if anyone knows in general how much chest room designers account for in today's slimmer suit jackets? I tried on the BB Milan today and that was pretty fitted....does anyone know what the actual chest allowance is for that suit, or perhaps other BB suits? Edit: I don't think the "double the armpit to armpit" measurement is accurate in measuring the chest of a suit jacket since some jackets have lower armholes than others....you might end up measuring closer to the waist using this method.