Dept. of Defense Against the Dark Arts
I don't know that this is an actual department. But the idea that it could be improves my day.
Product Details:Size Chart
Male model is 5'7" and wearing a men's medium
Female model is 5'7" and wearing a women's large
Men's printed on Port & Company, 100% cotton, black t-shirt
Women's printed on Bella, 100% cotton, black t-shirt