3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862 is the beginning of the awesome number that we know as "pi"! It helps us work out the circumference of a circle among other things and it's a fundamental of modern mathematics. Pi has its own day and now you can have your own pi shirt to proclaim your pi fandom to the world! Pi is an "irrational number" which doesn't mean that it makes bad choices, it just means that the digits that make up the number carry on into infinity (we assume) without repeating. This mystique has lead to quests to calculate the number to more and more decimal places and some people make the effort to memorize as many digits as possible. The clever graphic tee features a large white pi symbol on a black background, but if you look more closely you will see that the large pi is made up of the digits of pi in small print. Cool, right? You and your friends can use your shirt to check the results of a "memorize Product features: Men's Size Small/Ladies Size 10: chest 53cm, length 66cm Men's Size Medium/Ladies Size 12: chest 55cm, length 67cm Men's Size Large/Ladies Size 14: chest 58cm, length 69cm Men's Size Extra Large/Ladies Size 16: chest 60cm, length 72cm Men's Size XXL/Ladies Size 18+: chest 64cm, length 76cm Machine Wash cold, hang to dry. Iron on reverse side on cool setting and avoid ironing the design