Personalized Happy Pi Day Pink Math Symbol Women's Plus Size V-Neck. Cute pink pi math symbol with stitch border on a Women's Plus Size V-Neck - Black with Happy Pi Day quote. 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.