Personalized 4th Birthday Monster Truck Women's Plus Size V-Neck. I'm Four! A red monster truck drives over the words. Great fourth birthday gift for your favorite 4 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.