Sidney Harris Cartoon with caption: "I think you should be more explicit here in step 2."
T-shirt is Ash Gray.

Pricing: $17 to $24.

Mathematical Advisory: Graphic Content; Explicit Functions.
Graphs and explicit functions for straight line, parabola, sine, cosine, and semicircle.
Available in Black, Indigo Blue, Ash Gray, and White.

Pricing: $14 to $16. .

SALE! White Small Math Advisory t-shirts are on sale for $10, while supplies last.

Front upper left chest: Pi symbol in a circle.
Back announces your true nature: "Irrational but Well-rounded"
Available in Stone Blue, Ash Gray, Violet, and White.

Pricing: $17 to $21.

Front: geometrical representation of the gravitational field of a black hole, with the equation for the Schwarzchild radius.
Back (pictured): And God said - Maxwell's equations - and there was light.
T-shirt is Black.

Pricing: $16 to $23.

NEW!

T-shirt is black.

Pricing:
Adult Short Sleeve Small, Medium, Large, XL, 2XL: $17.

Show your knowledge of really large numbers and search engines with this shirt.

Pricing: $17 to $19

Pi al a Mean, Pi a la Median, Pi a la Mode, with mathematical examples.
Available in Black, Navy Blue, and Ash Gray.

Pricing: $14 to $16.

SALE! Pi a la Mode t-shirts in Ash Gray 2XL are on sale for $10, while supplies last.

This cartoon discusses the relationship between correlation and causation.
This design is printed on a somewhat lighter weight shirt than our usual heavyweight t-shirts.
T-shirt is Navy Blue.

Price: $18.

A version of the classic Smiley Face design rendered mathematically.

Pricing: $17 to $19.

The Pi-Lingual t-shirt features geometric diagrams for area and circumference of a circle, and a wide variety of advanced formulae featuring Pi.
T-shirt is Black.

Pricing: $17 to $19.