Our Mood Black Crystal Chubby Hoop Earrings are the perfect classic design. With shimmering black crystal stones, these hoops are made to make a bold statement; they're perfect for elevating any look. Wear them solo or mix and match with our other MOOD styles for a touch of everyday glam. Fastening: Post and Bullet Back. Width dimension: 37mm. Length dimension: 37mm. Material: Jet Plated Base Metal. 83% Zinc, 16% Glass, 1% Steel.