Personalized American Quarter Horse Lover Gift Idea Youth Long Sleeve T-Shirt. Loved By A American Quarter Horse Youth Long Sleeve T-Shirt - White has a horseshoe logo on this gift for a horse owner, trainer or breeder. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)