I'm doing online made to measure and I need some advice on shoulder width. Would you increase/decrease shoulder width? If so, how much? (Btw, I see the huge collar gap and am having this jacket remade partly because of that.) Thanks!
17.5 - 18.25 is typical for 38R, and I mean TYPICAL, however you can see things wildly outside of that since the size is just a chest measurement really. 20 ish inches for pit to pit typically. Looks like you MAY need a half inch smaller but kind of difficult to say without a point of reference.