XXL fits me at 6’4” and 240 lbs. Roomy. Good for concealed pistol carry if untucked. Long enough shirttails to stay tucked in for tall people if you want to look more put together. Zipper pocket on both sides is a plus for access to small wallet or paperwork. Fake button front with zipper underneath is perfect for using shirt as a shirt or (unzipped) a very light jacket.Can wear shoulder stripes for pilots/EMS uniforms. Versatile setup.I tend to wear tactical clothes/ hunting gear as my everyday. This fit in perfectly and are exceptionally comfortable.Friggin’ (as they say in Maine) buy these shirts if you dress in tactical gear and conceal carry.