Personalized 4th Birthday Dinosaur 4 Year Old Boy Women's V-Neck T-Shirt. celebrate your son's 4th birthday with this funny dinosaur and this boy is four quote 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit