Personalized Dinosaur 5th Birthday Party Youth T-Shirt. 5th Birthday Dinosaur Youth T-Shirt - White has cute green dino with number five and room to personalize for a birthday party gift. 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.