Personalized Big Sis Giraffe Girls Sister Cute Announcement Youth T-Shirt. Sweet giraffe big sis with younger sister or brother has Big Sis announcement quote on a Youth T-Shirt - White for girls. 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.