Personalized Cinco De Mayo Funny Boys Girls Youth Long Sleeve T-Shirt. Funny Cinco De Mayo Youth Long Sleeve T-Shirt - Royal Blue has cute little duck wearing a colorful sombrero hat for children to celebrate May 5 at a party. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)