NEW!

T-shirt is black.

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

As seen in the Numb3rs episode "Atomic Number 33". Area and Volume formulae are Easy as Pi when you wear this t-shirt.
Available in Black, Ash Gray, White, and Violet. Available in Adult Short Sleeve and Long Sleeve, and in Youth Short Sleeve .

SALE! Ash Gray Short Sleeve are on sale for $10, and Ash Gray Long Sleeve are on sale for $14, while supplies last.

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.

What do you get when you divide the circumference of an apple by twice its radius?
Apple Pi.
Available in Black or Ash Gray.

A version of the classic Smiley Face design rendered mathematically.

Pricing: $17 to $19.

This Sidney Harris cartoon t-shirt demonstrates the fine points of mathematical proof.
T-shirt is Ash Gray.

Pricing: $16 to $18.