Personalized 4th Birthday 4 Year Old Whale Women's V-Neck T-Shirt. 4th birthday Women's V-Neck T-Shirt - Aqua has I'm 4 quote and funny whale for a little boy 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