Personalized 3rd Birthday Rainbow Number 3 Women's V-Neck T-Shirt. 3rd Birthday Rainbow Women's V-Neck T-Shirt - Aqua has cute number 3 with hearts and rainbow for a little girl. 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