For a more fitted style, the small size works great under a jacket or blazer.
Drift Master Imported Tuned Custom JDM Sports Car Tank Top
What stands out about the small is the way it sits flat on your back.
JDM Culture Street Legend Imported Tuned Custom Sports Car Tank Top
If you are between sizes, the small runs slightly smaller than average.
Street Racer Imported Tuned Custom JDM Sports Car Tank Top
A nice touch is that the small size keeps extra fabric from bunching up.
Japan Street Life Streetwear Imported Tuned Custom JDM Sports Car Tank Top
You will find that the small size hugs your body without pulling at the seams.