Personalized Superhero 4th Birthday Pink Women's Plus Size V-Neck. Happy 4th birthday! Celebrate your toddler's third b-day with this cute I'm 4 pink superhero design. Happy Birthday four-year-old! So comfortable you'll want one in every color! These versatile v-neck t-shirts are great to wear to the office or at a weekend BBQ with friends. Available in a wide range of colors to compliment any wardrobe, these shirts are softly shaped to complement a plus sized woman's curves.