Skip to content

Afterpay is here! Shop now, pay later in 4 easy installments

Pi Symbol Shirt Adult XL

Save 40% Save 40%
Original price $29.99
Original price $29.99 - Original price $29.99
Original price $29.99
Current price $17.99
$17.99 - $17.99
Current price $17.99

 Pi is used by mathematicians to represent the ratio of a circle’s circumference to its diameter. It is a mathematical constant and an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers. Pi is approximately equal to 3.14159 and is commonly written this way, however, Pi’s decimal representation is  never ending. This shirt displays the symbol of Pi, π, using the number Pi to hundreds of decimal places. Pi, made out of Pi! Embrace your inner irrationality with the most popular of the irrational numbers. Perfect for mathematicians with a love for geeky t-shirts.

Please refer to the below sizing guide to find the best fit for you. Shirts tend to run large for women.

Shirt Image Guide

Professor Plums Toys plush tower

Need More Help?

FAQs | Shipping Policy | Returns Policy

Want to talk to a real Person?

Contact us on (02) 9906 7441


Meet us in store at 1 Ernest Place, Crow's Nest, NSW.


Our Guarantee

If you’re not 100% happy with your order, we will take it back and refund you the full amount you paid for the item within 30 days of when you received it – so long as it is unopened and still in resalable condition. All orders are dispatched within 1-3 days from when the order was received.

Postage Banner

Standard Post

Shipping for all orders is a flat rate of $9.95, and free for order over $120 for all Australian customers.

Express Post Banner

Express Post

Express is a Flat rate of $18.95 and is sent same day if the order is received before 1pm

International Postage Banner

New Zealand Post

International Standard post to New Zealand is currently $30 Flat rate for all packages to New Zealand.