Personalized Sweet Sixteen SS Youth Long Sleeve T-Shirt. Sweet 16th birthday Youth Long Sleeve T-Shirt - White with 2 pink S's that make a pretty heart, a cute pink flower and text that says SWEET SIXTEEN. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)