HARRY POTTER Slytherin School Crest Pewter Lapel Pin Fear not, muggle-born witches and wizards! Show your Hogwarts house pride with this Harry Potter Slytherin Pewter Lapel Pin. Perfect size for display on your shirt lapel, backpack, or just about anywhere else. This highly detailed crest is great for dress-up occasions, fan parties, or even makes the perfect-gift.