This is a great text Pi Day t-shirt with a funny slogan for math nerds. The full slogan reads "They Call Me PI Because I'm Irrational and I Don't Know When To Stop". The arrangement of the different mashup fonts is fun and playful. The white text pops against the black t-shirt (also available in other dark colors).

This is a patriotic Pi Day t-shirt design for math geeks. The first digits of PI are arranged in circles around the Greek letter. The red, white, and blue colors are arranged in the familiar style of Captain America's famous shield. It's Captain Pi!

Here the word PI, represented by the Greek letter π, helps spell out the name of a bird: the Magpie (or MagPI). The cute stylized name is accompanied by a cartoon image of a Magpie bird. This is a fun cartoon Pi Day t-shirt for math geeks who are also bird lovers!

If the math symbol Greek letter π makes you hungry, this funny simple text Pi Day shirt is for you. A large blue π symbol is accompanied by smaller text above that readsy simply "Mmmm..." as in YUM! Pie!

This awesome dentist t-shirt is a perfect gift for new dentists or to show appreciation for your trusted health care provider. Bold text reads "This is what an AMAZING DENTIST looks like" in all captial letters. Shown in pink, this women's cut top is available in nine other colors to match your personality and style.

This is a fun graphic t-shirt for anyone who practices dentistry. Three icons represent three important aspects of life: rabbit ear fingers for peace; a heart for love; and a tooth for dentistry. Text below captions the images, separated by hearts. Get this unisex cut shirt in natural (shown), light blue, or ash gray.

This t-shirt with the slogan "Trust Me I'm a Dental Student" in all capital letters makes a great gift idea for future dentists or anyone who is studying dentistry. The bold slogan is accompanied by a small image of a tooth. Get this shirt in Kelly Green (shown) or one of six other popular colors.