@Jordan2 I know when I look inside my Sketchers sneakers under the tongue they have what I think they mean universal sizing. I take a 9 US. On inside It has women's size 9 in US size, UK size, European size and Men's size. For instance my US 9 is a 7 Men's, etc.
Your Hoodie cant be a one size fits all, as they are offering sizes. If you wear a T-shirt under shouldn't make too much of a difference. I bet the women's large, and the men's Med are the same size Hoodie. Good luck! Fun Hoodie
“sometimes you have to bite your upper lip and put sunglasses on”….Bob Dylan