I usually wear L tall in the regular fit t-shirt. I ordered this shirt in XL tall thinking it would fit my shoulders better and that the slim size would make for a better fit in the torso. I was wrong. I returned the XLT slim for the LT slim and I love the fit. I'm 6'6", 215 lbs, and workout pretty hard 5 days a week, so I would say a somewhat athletic physique.
The Real MrT