Personalized Merry Christmas Reindeer Youth Long Sleeve T-Shirt. Merry Christmas! A reindeer, or maybe a moose, wearing a Santa hat and scarf sits on a Christmas present while holding a cup of hot cocoa. Maybe he's frustrated by the tangled Christmas lights? youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)