These are officially licensed Harry Potter necklaces. Each piece in this collection is beautifully designed and comes with an adjustable chain to fit any size. These necklaces are the perfect way to celebrate your Hogwarts house allegiance, making them a wonderful gift for any Harry Potter fan. The chain is 18" with a 3" extender. Express your love for your favorite house, whether it is Gryffindor, Slytherin, Ravenclaw, or Hufflepuff. We have the Harry Potter jewelry you'll love!