Buy all four Lumos charm bracelets, and save! This set includes one for each Hogwarts house -- Gryffindor, Slytherin, Hufflepuff, and Ravenclaw. Finely crafted, these bracelets are set with beautiful crystals and features three exclusive charms: a House Crest, a Sorting Hat, and a Lumos butterfly. Each bracelet measures approximately 8" in length, and is made by the Noble Collection, which will donate a portion of each sale to J.K. Rowling's Lumos Foundation, a non-profit organization that helps children around the world.Lumos is a spell created in Harry Potter that brings light to a desperately dark and frightening place. The Lumos Foundation is a non-profit organization founded by J.K. Rowling, which reveals the hidden children locked away behind closed doors and forgotten by the world, so that everyone first of all understands the problem and then works together to fix it.