Personalized Irish Flag St Patrick's Shamrock Toddler T-Shirt. Irish flag Toddler T-Shirt - White for St. Patrick's Day has shamrock clover in green. 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.