Personalized St Patricks Day Flag Irish Four Leaf Clover Youth T-Shirt. Irish Youth T-Shirt - White with flag logo and great colors. Add a name for a custom gift. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.