Official Harry Potter Slytherin Hair Scrunchie! Finish off your top knot with this magical scrunchie made from satin fabric with a Slytherin design. Slytherin is one of the four houses of Hogwarts School of Witchcraft and Wizardry, founded by Salazar Slytherin. The Hair Scrunchie is made from polyester satin fabric with an Outside diameter approx. 11cm. A busy girl who can always be sporting a messy bun. It's her signature look. You can wear the top Harry Potter Slytherin Hair Scrunchie knot anywhere. Ideal for the girl on the go, whether she's heading to business meetings, running errands, or squeezing in some cardio at the gym. Secure a bun, messy or tight, on your head. The House of Spells is the officially licensed Harry Potter Jewellery & Accessories seller.