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Pi Day, It's irrational! T-shirt

Pi Day, It's irrational! T-shirt

$35.00 USD
$35.00 USD
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Officially, Pi Day is celebrated on the 14th day of the third month, in honor of π's first three digits, 3.14.  But at Obscure Holiday, naturally, we're keen to celebrate all year round!

The It's Irrational shirt, features 260 decimal digits of pi on front and back. Digits by Steven; layout by Sarah. This one makes a great gift for the number-lovers in your life.

Pi is an irrational number. In case you need a refresher– we sure did!– an irrational number is one that cannot be described by the ratio of two integers, and which has unending decimal digits, and those unending decimal digits..?  --they can't terminate in a repeating sequence (such as for example 1/3 = 0.333333...). 
The number known as pi has no end, and according to mathematicians, has no repeating terminal sequence. As of today, pi has been calculated to 105 trillion decimal digits. (Wow!) 
We made this shirt with 206 lovely decimal digits for your perusal. 

Want to know another cool thing about pi? Pi is defined by the ratio of a circle's circumference to its radius. Geometry go! We made a shirt about this too!  (Here it is!)

Note:  The It's Irrational shirt is designed without our signature heart sleeve graphic.


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Shirt Quality

Our designs are printed on 100% cotton, medium weight, garment dyed shirts. We are currently printing on Comfort Colors 1717 tees. We love the colors, soft drape and comfortable, roomy fit of this product.

  • 100% ring-spun cotton
  • fabric weight: 6.1 oz/yd²
  • garment-dyed
  • relaxed fit
  • 7/8″ double-needle topstitched collar
  • twill-taped neck and shoulders (extra durable!)
  • double-needle armhole, sleeve, and bottom hems

Fit Guide

Shirt model Iris stands 5'8" tall and usually wears a size small. 

  WIDTH (inches) LENGTH (inches) SLEEVE CENTER BACK (inches)
S 18 ¼ 26 ⅝ 16 ¼
M 20 ¼ 28 17 ¾
L 22 29 ⅜ 19
XL 24 30 ¾ 20 ½
2XL 26 31 ⅝ 21 ¾

Printed on Demand

Our shirts are produced through on-demand fulfillment with a direct to garment print process. We think the quality is top notch, and love that this approach reduces overproduction, and enables us to keep it fresh.