Thank you for viewing. Natural stone: Apatite Chain: Approximately 16cm Adjuster: Approximately 3cm As these are natural stones, the size, shape, and color vary from stone to stone. There may also be cracks and inclusions. We hope you enjoy the unique characteristics of each stone. Shipping will be via Yu-packet Post Mini. We hope that these natural stones, with their natural beauty, will bring a little more joy to your everyday life. Thank you very much. ╰(*´︶`*)╯♡