You will find that the small size hugs your body without pulling at the seams.
DC Comics Superman Portrait Blank Face Men’s Blue T-Shirt SM, MD, LG, XL, 2XL
You will find that the small size feels comfortable yet polished.
Superman Mens T-Short – Lapel Logo Running Pose Back I Look Upon My Powers
You will notice the small size keeps the shirt from looking slouchy.
Adult Unisex Justice League DC Comics Top Medals Asian Style T-shirt
You will notice the small size doesn’t gap at the neckline like larger sizes.
Superman DC Adult New T-Shirt – Classic Logo Made of Thousands of Tiny Lo
A nice touch is that the small size has a slight taper at the waist.