For Science! Shirt 100% Cotton For Science! in a distressed, yellow print Dusky blue colored T-Shirt 100% cotton t-shirt Crew Neck Style Short Sleeve T-Shirt, and the shape of a test tube creates the "I" in Science! Length of T-Shirt measurement depends on size: Small 28", Medium 29", Large 30", XL 31", XXL 32", and XXXL 33"