Personalized Irish Mimi Little Leprechaun Youth T-Shirt. Cute leprechaun St Patricks Day Youth T-Shirt - White Irish shamrock with Mimi's little leprechaun quote for grandchild. 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.