ComputerGear Funny Pi Shirt T Shirt Math Geek Nerd Graphic Unisex Men Women Adult Tee 99% cotton/1% polyester; Machine wash/dry Small fits chest/bust 34-36 inches, Medium fits 38-40 inches, Large fits 42-44 inches, X-Large fits 46-48 inches, plus size XX-Large fits 50-52 inches, 3XL fits 54-56 inches, 4XL fits 58-60 inches Funny pi t shirt is quite the conversation starter; Makes a great STEM gift Funny What Part of Pi? tshirt makes your favorite mathematician smile; For those in the know, diagram illustrates the equation circumference divided by diameter equals your favorite math symbol Wear fun math shirt on ultimate Pi Day; Math teachers love Pi tee shirt Novelty adult Pi shirts are a ComputerGear copyrighted/trademarked design. Designed and printed in USA by ComputerGear only; DON'T BUY COUNTERFEIT ITEMS FROM OTHER SELLERS