These suncatchers are stunning. They are made to hang in a sunny window. As they catch the light, they reflect rainbows across the entire room. What a beautiful thing to wake up to in the morning! The suncatchers are between 18 to 20 inches long. The crystal is a 40mm and a high quality K9 faceted crystal and will not yellow over time. The beads are glass, acrylic, wood, and other material. Each suncatcher comes with a sturdy stainless steel hook. Hint: This makes a perfect gift for a person with limited space, someone who has everything, or when you don't know what to get somone for a gift.