Stackable expressions™ is a simple and stylish assortment of rings that can be worn together to express your style, your family and your personality. Crafted in sterling silver, this dainty design features a swirling open heart centered with a 2. 5mm lab-created verdant-green emerald. Buffed to a brilliant luster, this ring complements other stackable expressions™ options and is ideal for the may birthday girl. With stackable expressions™, it's your look, your way. Custom-made to fit her ring size. Sterling silver rings cannot be resized after purchase.