Personalized 5th Birthday Mermaid Women's V-Neck T-Shirt. Cute mermaid princess rides on her rainbow seahorse and surrounded by her fish friends. Happy birthday to the 5 year old on her 5th 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