Personalized I'm One Dinosaur Women's V-Neck T-Shirt. I'm One! A grinning dinosaur wearing a birthday hat rips through the shirt to wish the little one year old a happy 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