Personalized Math Counts Black Long Sleeve T-Shirt. Math, the only subject that counts is a humorous math design with a double meaning. Fun gifts for mathematicians, students and teachers at birthdays, holidays, graduation and back to school. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL