Personalized Thanksgiving Big Sis Announcement Turkey Youth Long Sleeve T-Shirt. I'm thankful because I'm going to be a big Sis cute girl turkey Thanksgiving pregnancy announcement on a Youth Long Sleeve T-Shirt - White. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)