Personalized Big Sis Girls New Sister Announcement Youth T-Shirt. Big Sis announcement for a little girl has heart and arrow design on a Youth T-Shirt - Heather outfit. 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.