No stacking needed—our Sol Cuff makes a statement all on its own. From beachside brunches to summer-night dancing, it’s the piece you’ll never want to take off. Inner Diameter: approximately 60 mm Opening size: 25mm Premium Stainless Steel + 18k gold PVD coating Waterproof & Sweatproof : Shower, swim and exercise with it, the color remains perfect Hypoallergenic & Lead-free  Delivered in an eco-friendly packaging & with a pack of stickers