Pi Day is almost here!

Celebrating on Friday, March 12th? At this point we recommend paying extra for Express Mail shipping.

Celebrating on Sunday, March 14th? Try to order by mid-day Wednesday, March 10th for delivery on or before the 13th . Orders placed by mid-day Thursday still have a good chance of arriving on the 13th. We also offer overnight shipping to most US zip codes.

This deadline is based on USPS guidelines and our experience. Priority Mail orders placed by this deadline are very likely to arrive on time, but are not guaranteed to do so.

See Pi T-shirts, Ties, Earrings, Pins, & Tote Bags

Pi T-shirts

Featured products

Sort by: Product Price Default
Pi Digits T-shirt Super Pi T-shirt Pi Symbol Glow T-shirt
Pi Digits T-shirt
Super Pi T-shirt
Pi Symbol Glow T-shirt
See details See details See details
Our price: $14.00
Our price: $16.00
Our price: $14.00
     

Products

Sort by: Product Price Default
Tie-Dye Pi T-shirt

NEW!

Individually hand dyed Tie-Dye Pi T-shirt. Each shirt has a pattern and coloring somewhat similar to the shirt shown, but no two are exactly identical.

Pricing:
Adult Short Sleeve Small, Medium, Large, XL: $22; 2XL, 3XL: $25.

Q T Pi T-shirt

NEW!

Added by popular demand. (Don't get it? Read the shirt aloud.) Printed on relaxed women's fit shirt.

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

Pi Digits T-shirt
BEST SELLER
Comes in Adult and Youth Short Sleeve, and in Adult Long Sleeve.

Celebrate Pi Day or just show your irrational side to 3045 digits.
Available in Black, White, Ash Gray, Pink, Stone Blue, Violet.
Long sleeves are Black or Ash Gray. Youth shirts are black.

Pricing: $14 to 19.

SALE! Youth Black are on sale for $10, while supplies last.
Adult Long Sleeve Ash Gray are on sale for $14, while supplies last.

Pi Symbol Glow T-shirt
Glows in the dark! Comes in Adult and Youth sizes, and in Adult Long Sleeve.

The Greek letter Pi, ringed by the first 130 digits of the irrational number Pi. The symbol outline and the digits glow in the dark.

Pricing: $14 to $19.

Easy as Pi T-shirt
BEST SELLER. Comes in Adult and Youth sizes, and in Adult Long Sleeve.

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 .

Pricing: $14 to $19.

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

Super Pi T-shirt
Comes in Adult and Youth sizes.

T-shirt is Blue.

Pricing: $16 to $19.

Pi-Lingual Math T-shirt

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.

Pi Irrational But Well-rounded T-shirt
Printed on Front and Back

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.

Pi a la Mode T-shirt

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.

Pumpkin Pi T-shirt
Comes in Adult and Youth sizes.

Our Pumpkin Pi T-shirt features digits of Pi carved into a pumpkin.

Pricing: $16 to $18.