found this handy guide for folks who consider buying on line ... or, if you've never purchased from a mens store, can walk into one with the sense of knowing, and the confidence that brings, what size that you wear.
Andy's Guide informs the reader about such things as why someone with a, for instance, 38 chest wears a 42 jacket, etc. Again, for someone either new to such information or who has curiosity about tailoring cloths.
http://www.askandyaboutclothes.com/T...easurement.htm