Personalized Patterned Ohm Symbol Youth Long Sleeve T-Shirt. An ohm symbol with a black and gray pattern is a unique gift design for electical and computer engineers and engineering college 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)