Personalized Programmer's Paint by Number Long Sleeve T-Shirt. A paint by number for computer geeks with hexadecimal numbers is a fun design for birthdays, holidays and graduation. 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