25% off storewide closeout sale!

This is a going-out-of-business sale. This was started as a family business, and since my divorce several years ago, my heart hasn't been in it. So I'm moving on.

Everything is 25% off, while it lasts!

Several designs are completely sold out and no longer available, and most shirts have sold out in one or more sizes.

Click here to see shirts listed by sizes that are still available.

Click here for for Women's shirts sorted by available sizes.

Click here for for Youth shirts sorted by available sizes.

Orders over $200 get a 15 percent discount and free USA shipping; orders over $400 get a 20 percent discount and free USA shipping.

Pi T-shirts


Women's Pi T-shirts
10 products

Youth Pi T-shirts
8 products

Featured products

Sort by: Product Price Default

Products

Sort by: Product Price Default
Super Pi T-shirt (Small, 2XL, 4XL)
Available in Adult 4XL and in Women's Small and 2XL.

Price: $20.

Pi Digits T-shirt
BEST SELLER
Available in Adult, Women's, and Youth sizes.


Price: $20

Pi-rate Math Geek T-shirt

Available in women's sizes, and in youth small (6-8).

Price: $20.

Pi Symbol Glow T-shirt
Glows in the dark!
Comes in Men's, Women's, and Youth sizes, and in Men's Long Sleeve.

Price: $20.

Easy as Pi T-shirt - SOLD OUT
As seen on TV in the Numb3rs episode "Atomic Number 33".
BEST SELLER. Comes in Adult, Women's, and Youth sizes.


Price: $20.
Pi By Numerals Math Geek T-shirt
Available in Adult Large and 4XL; Women's 2XL; Youth Small (6-8) and Medium (10-12).

A few thousand digits of Pi, arranged so that you can read them in continuous order through the shirt, printed in the form of a Pi symbol. Available in Men's, Women's classic fit, and Youth sizes.

Pi-Lingual Math T-shirt - SOLD OUT

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. Available only in Small and 2XL.

Price: $20.

Be Rational Get Real i vs pi T-shirt (Women's XL only)

Available in Women's premium ringspun Hanes Nano classic fit XL.

Price: $20.

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

Available in Adult t-shirt, Adult Sweatshirt, and Youth t-shirt. Front upper left chest: Pi symbol in a circle.
Back announces your true nature: "Irrational but Well-rounded"
Available in Ash Gray, White, Yellow, Lime Green, Dark Blue, and Light Green, depending on size.
Adult Sweatshirts available in Gray Medium and Gray 3XL.

Pricing: T-shirts: $20; Sweatshirts: $23.
Blemish Sale items: One Stone Blue XL at $15; one Yellow XL at $18.

Long-sleeve Denim Pi Shirt
Long-Sleeved Button-down Denim Pi shirt with embroidered Pi logo above left pocket.

$23.