Personalized Sweet 16 Stamp Toddler T-Shirt. Sweet 16th birthday Toddler T-Shirt - Purple with a distressed canceled postage stamp, fun pink birthday cake and the number 16. A toddler-soft cotton tee in look-at-me, big kid colors. 4.5 oz., 100% combed ringspun cotton. White is sewn with 100% cotton thread. Topstitched rib crew neck. Double-needle stitched sleeves and bottom hem. Shoulder-to-shoulder taping.