Personalized Shamrock Four Leaf Clover St Patricks Youth T-Shirt. St. Patrick's Day Youth T-Shirt - White gift has a pretty green border of four leaf clovers for luck. 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.