From the post How to Beat Procrastination (Part 2 in the procrastination series)
"You’ve become obsessed with the task and you lose interest in basically everything else, including food and time—this is called Flow. Flow is not only a blissful feeling, it’s usually when you do great things. The monkey is just as addicted to the bliss as you are, and you two are again a team."
Measurements are taken of the front of the shirt. For example, a Men's Small says Chest = 18", which means it measures 18" from left to right of the front of the shirt. The full shirt circumference = 36" (front and back combined).