Personalized Baseball 8th Birthday Women's V-Neck T-Shirt. Baseball 8th birthday boy. Baseball league style with bats and varsity letters. Sports theme for your 8-year-old's b-day party. Happy Birthday eight-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