Personalized Shamrock St Patricks Clovers Youth T-Shirt. Border of shamrock clovers for St Patricks Day comes on this green Youth T-Shirt - Kelly Green. 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.