Personalized 4th Birthday 4 Year Old Girls Rainbow Star Women's V-Neck T-Shirt. Cute rainbow starburst with pink number 4 on a Women's V-Neck T-Shirt - Aqua for celebrating a little girl's 4th birthday. 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