The Pi T-shirt

Regular price £22.00



The Pi T-shirt

Enjoy your unique Pi T-shirt while celebrating the mathematical phenomena known as pi. 

This unusual T-shirt is the ideal gift for the scientist, mathematician, or pie-eating lover in your life. It was designed by myself and so you won’t find it sold by anyone else, that makes it very unique and special.

So what is pi?

For the non-mathematician or scientist reading this, you may be wondering what pi is.
Well, pi is a number that is used to measure circles. It is the circumference of a circle divided by the diameter. This number is always the same, no matter what size the circle is. You can find pi by using a calculator, or you can remember it as 3.14….. (3.14 is a rounded number as pi continues to infinity).

Here are some fun facts about pi:

Pi is the only number that has its own holiday. Yep, March 14 (3.14 - get it) is International Pi Day.

Pi Day is also Albert Einstein‘s birthday

And Pi Day is becoming a traditionally joyful occasion within the food industry too, with many eateries featuring pie as Pi Day specials. Yum.

So make sure to get your Pi T-shirt as a gift for someone special or to enjoy for yourself 😉


Size guide:

Size:Chest (to fit) inches:
S34 to 36
M38 to 40
L42 to 44
XL46 to 48
2XL50 to 52
3XL54 to 56



When ordering your T-Shirt please be careful to select both the size and the colour in the dropdown selection tabs near the top of this page. Each T-shirt is printed individually as soon as you order it, this means it cannot be changed if you choose the wrong size or colour so please check and make sure your selection is correct. 

About the T-shirts

  • 100% cotton heavyweight T-Shirt
  • Seamless twin needle collar
  • Taped neck and shoulders
  • Twin needle sleeves and hem
  • Tubular body
  • Weight: 185 GSM. This is a heavyweight, great quality T-shirt - not a thin, flimsy, nasty one.

And the water-based inks:

  • Totally organic
  • 100% non-hazardous
  • 100% toxin-free
  • Completely vegan-friendly and contain no animal by-products
  • Safe for infants and babies

How to wash your Pi T-shirt:
Firstly, please ignore the washing instructions in the garment itself.  These are for plain T-shirts, not printed ones. Wash your shirts at 40 degrees or less. Iron on reverse (cool). Do not tumble dry.

What are the normal delivery times?
Once you place your order, it takes about seven days to create your T-shirt.  Our standard delivery is Royal Mail First Class, which typically arrives the next day in the UK, 6 days to the EU, and 10 days worldwide. It is important to note that delivery times are out of our control, and can take longer. 




Free shipping on all UK orders over £30.

For orders totaling less than £30: Live shipping rates will be offered.

Delivery times

Canvas prints are delivered by Royal Mail 24 or courier, and normally leave the lab within 10 working days of ordering (UK).

Mugs are delivered by Royal Mail or courier, and normally leave the lab within 3 - 5 working days of ordering (UK).

Canvas Tote Bags are delivered by Royal Mail or courier, and normally leave the lab within 3 - 4 working days of ordering (UK).

T-Shirts Once you place your order, it takes about seven days to create your T-shirt. Our standard delivery is Royal Mail First Class (UK).


Local Worldwide Delivery

Do you live outside the UK? Or would you like a print delivered to someone outside the UK?

My printer has printing facilities in a number of countries around the world besides the UK, including the USA, Europe, and Australia. So if you live in the United States, for example, the print or product may be made in the USA and delivered to you using a local courier. This reduces delivery times, costs, and removes any import duties that may have applied if the print had been imported from the UK. The print quality and materials used to make the print or product will be identical to a UK-made print.

If you are not in any of the countries with printing facilities, the country closest will be chosen to keep the delivery costs down. Not all countries can benefit from this, but many do.

International postage will be added at check out. If your country does not show postage options, please get in touch and I will make them available. Local printing and delivery, where possible, are greener, faster, and cheaper.


The Pi T-shirt
S (34" to 36") / Black - £22.00
  • S (34" to 36") / Black - £22.00
  • S (34" to 36") / Red - £22.00
  • S (34" to 36") / White - £22.00
  • M (38" to 40") / Black - £22.00
  • M (38" to 40") / Red - £22.00
  • M (38" to 40") / White - £22.00
  • L (42" to 44") / Black - £22.00
  • L (42" to 44") / Red - £22.00
  • L (42" to 44") / White - £22.00
  • XL (46" to 48") / Black - £22.00
  • XL (46" to 48") / Red - £22.00
  • XL (46" to 48") / White - £22.00
  • 2XL (50" to 52") / Black - £22.00
  • 2XL (50" to 52") / Red - £22.00
  • 2XL (50" to 52") / White - £22.00
  • 3XL (54" to 56") / Black - £22.00
  • 3XL (54" to 56") / Red - £22.00
  • 3XL (54" to 56") / White - £22.00

The Pi T-shirt

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