Port authority Ladies, we suggest ordering your shirt size like you would a normal T. These ladies shirts do not run small, but they are 100% cotton. Mollie B is modeling a MEDIUM-sized shirt. Mollie usually wears a small in a unisex shirt and a medium in a woman’s shirt.Size medium, large, and 3XL are all on back order. It will be at least June 10 before we have the shirt on hand.