London's Big Ben Clock Tower Sisters Infinity Toggle Chain Necklace. Silvertone Charm. Charm size is approx. 0.90 x 0.20 x 0.22 inches (HxWxD) including loop. 3mm Rolo Chain Necklace is 18 inches long. Infinity Toggle is approx. 0.90 x 0.40 x 0.10 inches (HxWxD). The infinity symbol represents the quality of being limitless or endless. Choose your favorite message to represent your love, faith, or commitment that lasts forever. PLEASE NOTE: Our products are lead safe, but are not intended for children 14 years and younger.