These are the standard uniforms of After Academy, the ones that Lacey and her classmates would wear. What you see here is the male uniform on the left and the female uniform on the right. However, gender-associated names are not hard and fast. Man or woman may wear male or female uniforms or wear the male top with the female skirt or the female sweater with the male pants. Every student is usually given seven of each. Even then, the only time one HAS to wear a uniform is during some event. The ascot, tie, petticoats, and belt usually stay white until the student has chosen a house based on Death, War, Pestilence, Famine, and, more recently, Lacey.
