Personalized So Cute Prince Youth T-Shirt. Youth T-Shirt - White with a blue crown says I'M SO CUTE I MUST BE A PRINCE! Perfect for a royal baby boy. 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.