Personalized design_twenty_four_seven_website Youth Long Sleeve T-Shirt. Are you a designer that works 24/7? Youth Long Sleeve T-Shirt - White. Get this perfect gift for that graphic designer in your life that is in constant design mode. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)