'90s Halloween Costumes: The Sanderson Sisters From "Hocus Pocus" What to wear for Winifred: Long green robes, big red hair, and lipstick on the centre of your upper and lower lips. Carry a broom. What to wear for Mary: A red dress and robe, crazy-big hair, and a crooked smile. Carry a hoover. What to wear for Sarah: A low-cut dress and purple robe, long and teased blonde hair, and a choker. Carry a mop. How to act: Evil, sadistic, and a bit ditzy (if you're Sarah). Do lots of cackling and sneering at children. Image Source: Everett Collection