Personalized Smart Civil Engineer Youth Long Sleeve T-Shirt. Civil engineering, the profession for intelligent people with the E in engineering wearing a hard hat is a humorous gift design with attitude for engineers and students at back to school, birthdays, holidays and graduation. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)