Stackable expressions™ is a simple and stylish assortment of rings that can be worn together to express your style, your family and your personality. Express your individuality with a fun 4. 5mm black and white enamel zebra print ring. This sterling silver ring will be polished to a brilliant shine. Add some extra sparkle with additional stackable expressions™ polished or textured bands and diamond, message, or enamel rings. With stackable expressions™, it's your look, your way. Sterling silver rings cannot be resized after purchase.