Regardless of our affinity for math, most of us celebrate Pi Day. March 14th and pi, 3.14, share the same digits, so it’s the perfect day to wax poetic about the number designated to represent the ratio of the circumference of a circle. Or, better, the perfect day to eat pie. But since we can’t send you a slice, we’re sharing newly released pi shawls, circular wraps that give a nod to pi. And for those of you on a diet, we included half pi shawls, too.