Personalized 4th Birthday Rocks 4 Year Old Girl Women's V-Neck T-Shirt. 4th Birthday Women's V-Neck T-Shirt - Hot Pink have plaid heart design number four with princess crown and 4 Rocks 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