I don't own a Utility but I do own Jacks, Mechanics, Californias, Motos and one Yosemite. The shoulder measurement in particular is amazingly consistent and I'm a hair over 19.5" on a tape measure across the shoulders. A 42 (Large) for me is spot on. I'm 5'7" 178 lbs with a 33" waist and a 43" chest. I do get all my T/S shirts shortened to 27" by a seamstress.