ComputerGear Here's looking at you Euclid T-shirt This Here's Looking at You Euclid T-shirt is a favorite among mathematicians Clever Here's Looking at You Euclid T-shirt celebrates the Father of Geometry and his elemental proofs Heather Grey 90% cotton / 10% polyester T-shirt Small fits chest/bust 34-36 inches, Medium fits 38-40 inches, Large fits 42-44 inches, X-Large fits 46-48 inches, XX-Large fits 50-52 inches, 3XL fits 54-56 inches, 4XL fits 58-60 inches A ComputerGear Exclusive; Machine wash/dry; Made in the USA