Personalized Big Bro Announcement Thanksgiving Brother Youth Long Sleeve T-Shirt. I'm thankful because I'm going to be a big bro Youth Long Sleeve T-Shirt - White new baby announcement for Thanksgiving family dinner gatherings. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)