Silver Tone Caduceus - DO To Infinity Friends Toggle Necklace. Charm size is approx. 0.741 x 0.7 x 0.13 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). Mini Infinity Sign link is approx. 0.41 x 0.17 x 0.11 inches (HxWxD). The infinity symbol represents the quality of being limitless or endless. Friends Forever.PLEASE NOTE: Our products are lead safe, but are not intended for children 14 years and younger.