I am a "bigger guy" not actually a fat guy. My roll doesn't touch other skin
6' on the dot and 245 pounds. I carry IWB with either a Crossbreed or Kholster 95% of the time. I wear a white tee (commonly known as a wife beater) with a cover shirt. In the winter I may skip the tee and go with a mock neck.
With the good holsters and a Wilderness Tactical belt I am GTG. I wear my gun at least 12 hours a day, every day.