Personalized Baseball 4th Birthday Women's V-Neck T-Shirt. Baseball league sports style 4th birthday boy with baseball bats. Cute sports themed 4-year-old b-day party gifts. Happy Birthday four-year-old! 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