About T-Shirt Design
The joke on Fit Shaced St. Patrick's Day T-Shirt is easy to understand, and that is a big part of why it works. It has a clear everyday humor vibe, which makes it easy to picture as a gift or something to wear for fun.
It works for holidays and birthdays, but it is also the kind of shirt someone could wear whenever they feel like it. The sarcastic t shirt vibe is there without making the design feel too mean or over the top. For a funny t shirt, it keeps things pretty straightforward and lets the saying carry the humor. It has enough personality to be funny without looking like it is begging for attention.